How to Decarb Weed The Right Way (Temperature Chart)

Today you will learn everything there is to know about decarboxylation. I’ve also included step by step instructions and two charts that are super easy to follow along.

So let’s jump right in, without any further ado.

What is decarboxylation and why is it important?

Decarboxylation process

Decarboxylation is the magic behind making cannabis a potent additive to food.

Simply put, it’s a chemical reaction that is achieved through heating up raw cannabis to a temperature at which it releases a carboxyl group and becomes psychoactive.

THCA (Tetrahydrocannabinolic Acid) is the active component in raw cannabis, and it’s not a psychoactive compound by default.

Through decarboxylation, we’re essentially applying heat to plant material so that the THCA gets converted to THC, enabling us to get high.

Chemistry of decarboxylation

chemical structure of thc and cbd

Cannabinoids in raw cannabis have an extra carboxyl ring in their molecular structure.

For the purposes of this article, we’ll focus on the two most prevalent: THC and CBD.

This extra carboxyl group gets removed in the process of decarboxylation due to the effect heat has on their chemical structure.

Once enough heat has been applied, the molecule will release a carboxyl group. That carboxyl group then gets replaced with a hydrogen molecule.

This process is pretty much the same for CBD. Both CBD and THC acids are carboxylic acids which tend to decompose directly when heated.

Only complex carboxylic acids decompose under the influence of heat alone.

Exclusive bonus: If you’re using cannabis for medical purposes, feel free to download our free dosage eBook which explains the exact step-by-step process Dr. Dustin Sulak used to successfully treat more than 18,000 patients with cannabis, including the day-by-day dosage charts.

Decarboxylation chart

As with any other chemical process, there are certain things that need to happen in order for chemical compounds to change their structure.

Decarbing is a process which involves both temperature and time, so it’s all about balancing the two.

Luckily for us, there is a chart.

Decarb chart

This is called a decarboxylation chart and it allows you to see how you can reach the desired THC by baking the buds on a specific temperature for a set period of time.

As this chart was based on a strain that can reach a maximum of 15% THC, you can see that the easiest way to reach that amount is by baking cannabis in an oven for about 7 minutes at 300°F (148°C)—or for 20 minutes at 250°F (121°C).

How to decarb weed (in 6 steps)

So far, we’ve learned that decarboxylating cannabis is a needed step in making super-potent edibles and that cannabis can be decarbed in several ways, depending on the temperature and the time you bake it at.

We also found out that the easiest way to decarboxylate cannabis is to bake it at a relatively low temperature for about 30 minutes.

Now, here’s a step by step guide:

  1. Preheat the oven to 250℉. The light should turn off once the oven has reached the temperature.
  2. Break up your cannabis into small chunks. Don’t grind it, just break it into smaller bits and don’t leave any nugs out.
  3. Spread the cannabis on a piece of baking paper. Make sure there are no overlapping pieces of cannabis.
  4. Bake the cannabis at 250℉ for 25-30 minutes. Make sure not to open the oven too often. Decarbed cannabis should change its color from green to light brown.
  5. After 25-30 minutes, check your cannabis. It should be light to medium brown and should be very dry. If it’s not, put it back in the oven for an extra 5 minutes. Keep an eye on it so it doesn’t burn.
  6. Remove cannabis from the baking sheet and let it cool off for a while. Careful, it’s going to get very crumbly at this point.

If this sounds complicated, you can always get a Magical Butter machine or the Nova Decarboxylator and skip all of the steps above, as the machine does everything for you in under an hour.

Now, once your cannabis has cooled down sufficiently, you can put it in a food processor and pulse until it’s thoroughly ground (like oregano).

If you’re going to use your decarbed weed in smoothies or drinks, you should continue grinding until you turn it into powder. For food, there is no need to do this.

Decarboxylation temperature chart

Decarboxylation temperatures times
Use this chart to decarboxylate kief, hash, oil and high THC/CBD flowers.

Decarboxylation temperature is probably the most important factor when decarbing different types of material.

As you can see on the image above, decarbing can be done in 3 different ways—the basic and the most common way is by using an oven, but you can also do it in a hot water bath.

To decarb kief or hash in an oven, bake it for 10 minutes at 300°F (149°C). Have in mind that, on higher temperatures, kief and hash tend to decarb faster than dried flowers.

High CBD strains tend to decarb a bit slower than those with high THC content:

  • Decarb high CBD strains by baking them for 15-25 minutes at 300°F (149°C)
  • Decarb high THC strains by baking them for 10-15 minutes at 300°F (149°C)

Continue reading

It’s time to put decarboxylation to good use. You can do so by following these guides:

Categories Basics

146 thoughts on “How to Decarb Weed The Right Way (Temperature Chart)”

  1. Hi there, I am a beginner with making edibles, just needed a few tips… Last night I decarbed my weed in toaster oven. i chopped up a quarter (7 grams) and laid it out on tray, put into preheated toaster oven . I had originally planned to go for an hour at 120C, but by ten minutes had already turned medium golden brown. I (stupidly) panicked and opened door to reduce heat but shut quickly again. Left it another five minutes and got scared and took it out! Very dry but no black. Put it into coconut oil in slow cooker for five n a half hours, strained it left it overnight in fridge. I haven’t tried it yet, just thought I should get info first?! I wanted to make chocolate. not sure on ratio. Also, Last time I decarbed in same for 30 minutes came out very green brown. Why such extreme difference in result. Toaster oven brand new. Thanks! 😻✌

    • Hey Pop,

      So, what I got from your story is that since your oven was brand new maybe you simply aren’t yet used to how it works since you were more familiar with the old one.

      Then again, it can be a lot of factors since some weed is more moist than other and it can take longer to decarb. It is a very weird process and results can vary…

      But it all comes down to this: you just need to keep the weed at this temperature for some time so that the THC-acid which, needs heat, turns to THC. 120C is a relatively high temperature so this process will usually happen after 10-15 min but just to make sure we like to recommend our readers to keep it inside a bit longer as nothing bad will really happen.

      As for the ratio, I would suggest keeping it low so that you can spread it out and this way you make sure you won’t take too high of a dose.

      Enjoy your treats!

  2. I make salve in small batches. And I was given apx 1/2 lb of trim/shake. ( I live in oregon) what I would like to know is can I decarb all of it and put it in glass jars for later use and how long will it last in decarbed form in the glass and how long shelf life is for the salve.

  3. Thanks for your reply! I’m going in for another round! I live in Australia and it’s not legal here so if you want edibles you gotta make them yourself! I’m determined to get this right! I will try to be more specific with my questions this time! (I just read my last question and couldn’t even understand it lol!) I will try your advice tonight and maybe lower temp, so like 20mins at 105c? Also, what colour should the weed be? I keep hearing conflicting info, done a golden brown others say dark green… Thanks 😸

    • Тhe color of the weed sometimes really depends on the strain. There’s really no rules when going about this, it’s just what you feel works best for you… It’s not an exact science you know 😀 anyway, I hope everything worked out for you!

  4. Oh by the way, I have two thermometers going on my oven now so the temperature is being monitored closely! One is a digital meat thermometer and the other an oven thermometer. They work brilliantly together lol!

  5. I am making cannabutter first time.
    I’m in a great deal of pain when standing. I was on my feet too long got anxious and the next thing I noticed I put my kief in my butter before decarbing it. What now
    Please help

    • You can activate it through cooking, baking , saute. Etc. mind your temps and time and you will be fine.

      The magic will still happen and all the medicinal terpenes are still present.

  6. I did a water wash to make my cannabis oil taste better. I didn’t dry it completely thinking it was going to dry in the oven when I decarbed it. It’s on 215, been in there for over an hours and its still wet. have I ruined it? Do I leave it in longer to dry and then decarb? Yikes, I can’t find my answer anywhere.

    • Hey Robin! I know I’m a bit too late, but I hope you didn’t dump the whole batch!

      I don’t think you ruined it. Water is ok, plants growing outside often get water all over them because of rainfall. This is no big issue.

      Keep it in the oven and it will decarb and dry out. Everything should be fine.

    • Hi Mariko!
      Unfortunately, THC isn’t water-soluble. There are ways to infuse water with THC, but those require industrial-grade machines for infusion.

      The next best thing would be weed tea, which is a fantastic way to take your medicine without having to smoke or drink.

  7. Hi there… I plan to decarb about 7 grams for a dessert. So after breaking up and putting in the oven for 25-30 minutes, I’m going to kind of “simmer” it into evaporated milk for about an hour – that’s how I planned to infuse my desert – THEN it needs to be baked for about another 40 minutes. Will all of this heat after decarbibg affect the thc in any way? I’m making a custard… any other suggestions?

    • Hey Lennette,

      That sounds about right to me. I’m not sure about mixing it with evaporated milk, I never heard of that. Maybe you should try using cannabis-infused butter instead?

      The additional heat afterward won’t affect the cannabinoids in the infused material as long as it doesn’t start evaporating, so try to keep the temp as low as possible.

    • Hey Jeffrey,

      I’m pretty sure you do not need to decarb it if you don’t want THCA to turn to THC. However, you do need to activate other cannabinoids such as CBD for making medical lotions and such. There is research being done in regards to the medical effects of THCA, but we just barely scraped the surface. So far, there are reported anti-inflammatory, neuroprotective, anti-emetic and anti-proliferative properties in THCA, however further research is needed on that topic.

  8. I am decarbing for the first time and I am using a toaster oven. I want to use a half but I need to know what temp should I set it to, and how long should it be in the oven?

  9. I don’t understand the logic behind all of this. When we vape weed, we have to exceed a certain temperature to release all the cannabinoids. Those temperatures are beyond 300 degrees Fahrenheit. Now, when we want to make edibles, why not just heat up the ground up a flower in an oil with a high smoking point for a couple of minutes? Why do we need to decarb for hours at lower temperatures? Also, why put the herb in the oven when you end up infusing oil or butter for brownies etc. anyway? This extra step doesn’t add up to me. Heat is heat so it shouldn’t matter whether the herb is exposed to eat in oil/butter or in the oven.

    • Hey dude, we didn’t invent this, we’re just saying how people have been doing it for years. If you don’t want to decarb, by all means dont do it…

      However, there is some science behind it. Through gradual warming, the cannabinoids are supposedly easily released into the solvent after you’ve decarbed the weed.

      Also, you are giving time for the THC-acid to turn into THC and increase the contents of THC in the herb you’re using.

    • Wouldn’t you have to inhale the steam off the pan?
      Seriously though- if you are vaping you are releasing a vapor (hence the clever name) containing terpenes and tch/cbd which you then inhale.
      You’re describing a condensate process which I dont think is worth the yield.

    • brother, beyond a certain threshold thc evaporates. that means “turns to a gas.”
      we dont want it to do this, we want it to remain solid but activate.

      like you said, heating the sweet baby peen out of it vapes it. youd have an oven full of thc gas and some thc-free bud.

      hence the medium temps.

    • It should work that way too.

      I have made waffles several times using the following absurdly simple procedure:
      1. finely grind your weed
      2. mix it with oatmeal and water to get a suitable dough consistency
      2b. optional step: add some lecithin. Theoretically it should improve resorption. But I did not notice a difference with or without the lecithin.
      3. bake each waffle in a waffle iron for about 5 to 10 minutes

      Voilà!

      Downsides:
      – The smell while baking will be very noticeable.
      – It is essential the waffles can thoroughly dry after baking (several days in the open air). They WILL mold if put in a closed container before *completely* dried.
      – the taste is somewhat unusual 😉
      – you must calculate the required amount of weed correctly. And start cautiously determining how much of a waffle you need for the desired effect.

  10. Which method gives a better yield of THC, the oven method or the hot water method? I’m also worried about the cooking weed smell that would come from the oven method.
    Thanks!

  11. can the weed still be used for medicinal purposes if it was put in the freezer shortly after harvesting?
    What if the weed dried out in the sun, will it still be usable?

  12. I made Rick Simpson oil from an ounce and everclear but it went to tar quickly and only saw 200 for a few minutes. I don’t think it is that potent. Can I save it on a hot plate or oven ? It’s already thick.

    • Yes you can, just be aware of the alcohol evaporating on the hot plate. It’s very dangerous and can easily light up. I strongly recommend you do that outside

  13. I had some seedy weed, I’ve decarbed, and grinded it into a powder. Can I use the ground seeds in a brownie mix, do the seeds have any thc after decarbing?

  14. I’m about to try this recipe from Bong Appetit. (it’s a very short vid)
    https://youtu.be/AD3QNMgqgkU

    I think this would be nice with my tea and it seems very simple for my first infusing/cooking try. Everyone in the comments keeps saying to decarb first before doing the process. Isn’t the 2 hrs of heating in the water decarbing?

    Also any other suggestions or recommendations would be greatly appreciated!!!

    • I dont know anything about decarbing in water. Decarbing is done to transform the THCA into THC. It happens when heat is applied, and best done over time.
      I don’t know if that would work with a tea, I guess it would but don’t hold me for my word lol

  15. Do you have to cook the decarbed weed into oil? Or is the decarbed weed good to be thrown on… Idk cereal? I thought thc needed to bond with lipids for our liver to digest them.

    • You don’t have to cook it. Decarbed weed can sit for a while in your fridge, or just a bag. I prefer to use it for making weed butter, which I later use for making edibles.

  16. so back in 2003 my brother was going to college in pendleton, he had a few buddies that had box vapes and turned the ash which is that brown color and breaks away by the touch and turned that into edibles. they were the best and strongest i have ever had. so i decided to buy a vape and do the same. so since its already been kinda decarbed do i do it for less time or just move on to making the butter

    • I don’t know anything about using weed you already vaped. I never tried it and none of the people I know probably haven’t either.

      From a scientific/cooking standpoint, I guess you can use vaped weed without additional decarbing because it’s being processed by heat in the vaporizer. If you’re gonna do this, do it with a few grams at first, make a couple edibles, and let us know. We’d be interested to know and try for ourselves.

    • I have decarbed my ABV & used w/o decarb. Results varied as did my pseudo scientific methods. I also decarb in the oven a bit, always to compare my AVB strength. My anecdotal experience is thus. Buckle up a bit lengthy. I came back to MMJ after 30+ years regular use almost daily 8 months , daily since so total 18 months (ish). The kicker is I did my first grow which allowed me to “experiment” as such my tolerance is for shite.

      My edible journey is such…I vaped from day one. Even that is too harsh on my lungs IMO. As such I began with eating just small amounts of RAW ABV at first my wife and I could only tolerate 2 hits from our PAX2 maybe so each load in vape maybe > .025 gr ABV and if I ingested that with a handful of walnuts I was off for 6-10 hrs. Soon .15 or so was fine and lasted 6 + hrs mostly. But I digress, now my dose is about 1.6 – 1.8 plus vape a few PAX’s and I can get to sleep with warm glow prior for couple hours.

      But my decarb has changed much, I have done Steamer vac pac’d, Pressure cooker Low Pressure, Boiled, Toaster oven, Oven, currently Oven with Mason jars Da BOMB no / low smell keep most terps bud even stays a bit moist if you start thaT way…

      FYI if using Mason Jar I have read & when I remember l burp them some gas build up. But I forget a lot! Usually vaping away to make ABV for more edibles. Anyway I have never fel much pressure after 20 -30 mintues at 250 ish Fahrenheit I only do an 1/8 to 1/4 at a time lest I screw up its small batch!

      I never use unless end product light brown, tied w bit of green et. al. So my results have been to date ASAIK there has been no great method for me. To clarify with increase in my tolerance and experiments it’s difficult to say w/o a lab which I don’t have access to. It seems that my GD tinctures are less powerful than at first, may very well just be my tolerance. Most likely it is (SIGH) tolerance.

      Anyway I have infused oil, made GD Tinctures several gallons by using everclear, recently tried oil infusion with coconut. Hahaha that when I learned I have an allergy to weed! Hopefully only via touch.

      My best decarb was only of my earliest and that was decarbed ABV now I only used PAx 2 at that time and as soon as it tasted close to the burnt popcorn load fresh. That was toaster oven & I swore I burnt it all, but that tincture kicked ass!

      I know this is an old thread but I so wonder about effective decarb I have considered those little decarb home use things. I just don’t think the risk is worth finding out I have been doing near perfect decarb.

      Effect to me seems so subjective as does how much you feel a hit of serious herb and are floored, yet the remainders are going for another round. The “science” or charts on the web have temps under hexane extraction or whatever vernacular. I am a tech dude not a scientist or physics major.

      So extraction, decarb, infusions, tinctures ad nauseum for DIY and even commercial products there is little exact with the extractions as exception. But aside from rosin press I think that not a healthy option for me anyway.

      I love this plant I have lots of old people health issues and have been on pain meds for decades. They have stolen a good chunk of my sole, w / MMJ I have reduced and soon hope to be off. So I am not sure if this aids anyone, I do think the original article was quite good & I have read a lot of them.

      I think this site listed the boil times & though my vac pac steamed and boiled worked they did not brown as much as the oven. I just finished and 1/8 in the oven so maybe couple days I will test longer in pressure cooker I think that’s like 220f just a little hotter and I don’t have to deal with evaporation.

      PS sorry for lack of some punctuation arthritis makes it not worth the pain later

    • I tried using vaped weed and was surprised how potent it still was. Maybe not as good as the weed decarbed in those little ovens made just for decarbing, and it smells like shit. But I could vape till I had a couple grams and then just ate it mixed with yogurt.

  17. Omg I’m reading this blog and it’s confusing me. I’ve been doing this for years real simple take and ounce of weed dry it to almost dust take 48 ounces of oil ( regular cheap cooking oil) heat the oil to 250F add weed when bubbles are close to stopping in about 35min shut off cover and let cool but oil is ready to use dosage is a teaspoon can be used topically or orally in food I infuse everything peanut butter, grilled cheese, pour on the bread of a sub…
    This is full active relieves pain stress depression etc.. use this oil as in any recipe that calls for oil
    Good luck explaining this Alex

    • OK, but how does this have anything to do with decarboxylation? You’re talking about oil and this is an article explaining how to decarb weed lol

  18. Hello! By Decarbing, how much of the potential THC are you unlocking?

    Say 1g at 15% has the max potential to yeild 150mg thc in liquid butter

    How much would transfer pre and post decarboxylation?!

    Thank you for your article!

  19. If my goal is just to get really high as many times as I can with a quarter oz, should I just smoke it, or will it go farther or get me higher another way? Cost vs effectiveness matters to me.

    • I’m not really sure. I would assume that edibles are the most cost-effective way to get high as they keep you high for hours at a time, even if you have a high tolerance. But, edibles take about an hour, sometimes longer, to kick in. That’s why I’d supplement them with another form of ingestion, preferably vaping because it’s the least detrimental to health.

    • Here’s a simple cannabis oil recipe! However, this recipe uses normal, not decarbed weed.

      You’ll need: 10-15 grams of weed, 1 cup of olive oil, cheesecloth, double-boiler or slow cooker.

      1. Grind the weed just a bit, or just break it down with hands, but it shouldn’t be ground to powder.
      2. Combine the ground weed and oil in the double-boiler or slow cooker.
      3. Heat the two together on low or warm for a few hours. Slow cooker on low for 4-6 hours, stir occasionally. Double-boiler on low for at least 7-8, stir occasionally.
      4. Oil temp should not exceed 245°F (115°C)
      5. Thoroughly strain the oil. Do NOT squeeze the cheesecloth, this will only add chlorophyll.

      Store it in a glass container in the refrigerator if possible. That way you can have it for at least 2 months.

    • I guess you could do the same thing with decarbed weed, but the problem with decarbed weed is that it is almost like dust and you won’t be able to strain it properly through the cheesecloth. You will have a lot of chlorophyll in the oil and it will most likely taste really poor.

    • Absolutely. Those are 2 completely different processes. Curing is just the process of making it more smoke-able, while decarbing is activating the weed’s inner potential.

    • If you plan on making edibles with it, yes. If you’re just gonna smoke it, no. Decarbing is done to activate the THC which isn’t activated yet. The THCa breaks up and leaves THC behind at a certain temperature. When you smoke weed, you achieve that temperature (and higher) simply by smoking – the cherry is crazy hot, way hotter than the temp needed for decarbing. I hope that makes sense.

      • It is smokable, but why would you do that? The chemical reaction activates the THC in the flower, it doesn’t leave the flower. Once you ingest the flower or you extract THC and then ingest it, it will make you high.

  20. I have quite a bit of already finely ground weed (almost has a kief like consistency) that I’d like to use for edibles. What is the best way to decarb it to infuse in butter?

    • Well, the best way would be the one I’ve written here. Just instead of a cloth strain use a micron bag because if it’s almost like kief then it might seep through the cloth.

  21. I have a simple question that I was surprised to not see already asked:
    I am using a sealed silicone box with an inserted oven thermometer (bought from Magical Butter) to decarb my supply. I plan to preheat the oven to 250F and decarb for 25 minutes. Should I wait until the internal temperature in the box reaches the target temperature before starting my timer, or should I start the timer when I put the box in the oven? Thank you.

    • Start the timer when you reach the temperature you desire. So if you’re baking for 25min at 250F you start minute one when the oven is at 250 and you put in the broken down weed.

  22. I have a butter maker and I put my oz in and added the prior batch to it. Probably too much but that first batch is a little stronger THC. While squeezing out the liquid it held back a lot of butter. Can you tell me how to extract more of the butter out of the processed cannabis

    • you can make some sort of makeshift press by squeezing it between two bowls or something of similar sort that will keep the butter once it is squeezed out

    • The best thing that I personally have found is once you have the mix in a cheesecloth or strainer, you take a half to a full cup of hot almost boiling water and pour it over the top. It will separate the butter from the bud and will collect in the bowl. Also the water will do 2 things; 1 it will make sure you get all the butter. 2 the water will separate at the bottom of the bowl and also any setament that slipped through will collect there. The THC connects to the fat in the butter, so water will not effect it at all. Hope this helps.

      • This actually may be the best way to do it. By pressing and squeezing the cheesecloth strongly you will also get a lot of the chlorophyll out and that’s the stuff you don’t want because it gives the butter a funky taste…

  23. While I appreciate the reply, I don’t think you understood my question.
    “I am using a sealed silicone box with an inserted oven thermometer to decarb my supply. I plan to preheat the oven to 250F and decarb for 25 minutes. Should I wait until the internal temperature in the box reaches the target temperature before starting my timer?” It took over 15 minutes for the inside of the box, and therefore my product, to reach 250F after putting it into the pre-heated oven. I decided to wait until the temp in the box was reached and then left it for another 20 minutes, which is the low end of the time range shown in the graph above. In all, the box was in the oven for probably over 40 minutes.

  24. Hey there! I’m wondering- once the bud has been decarbed, is it necessary to use it right away (finish making oil/ tincture etc) or can it safely be stored for any amount of time, and then finish making final product at a later date without losing any of the potency? (Day/week etc) Thanks for all the wonderful info!

  25. Hey, I was wondering something. I have kids, and I was wondering how bad the smell would be if we decarb in the oven? Would the smell effect the kids? Should I wait until they are at school or in bed?

    • It’s not the smell that gets people high, it’s the cannabinoids in the weed. When you decarb you don’t release those in the air, you just activate them to their full potential. Your kids should be good around the oven, it’s up to you whether to save them from the smell or not, but the smell itself won’t do a thing.

  26. How to decarb with a Hot oil bath?

    Some articles say not to submerger weed in oil to decarb it.

    I want to decarb BHO but don’t have access to an oven.

    • just toss the BHO in a dish which you will be able to scrape it out from, such as a glass dish or some type of bow. Put it in a pot filled with water. Bring the water to a boil. Leave it in there for at least an hour. I strongly suggest you look up videos on youtube as it is much more descriptive and easier to follow when it comes to complex things such as hot oil baths and stuff.

  27. Hello, thank you for the great article! Do you have any suggestions for those decarbing an already very dry product? For example, I have 28g of very dry Blue Dream. Do I need to adjust your method at all?

    Also, if a strain is tested at 19% THC, how can I know the % after decarbing? Is there a way to estimate what % THC will be in butter?

    Thank you!

    • There isn’t anything that makes me happier than when someone like my writing and finds it to be a great read. Thank you for that.
      As for your problem, there aren’t any differences. I would strongly suggest that you don’t break up the weed too much before putting it in the oven if it is already too dry. If you break down too much it will become ashy and hard to work with.

  28. Hi! I used to make cannabudder all the time using my Magical Butter machine after the decarb. I used to decarb in a small Pyrex dish at 250* for 30 mins. Everything worked as expected. I’ve recently moved to a house that has an electric oven as opposed to the natural gas I used to have.
    Since moving, I’ve tried to make 3 batches of butter. All the same process, all the same way, except for the different stove. And it just doesn’t work. I could eat the whole batch and feel nothing. Does it maybe take longer in an electric oven for some reason? I’m stumped. I’ve calibrated the stove, it gets to temp, but somethkngvis ovbiously different. Any idea as to what could be the problem?

    • Hi Ron, I honestly have no idea what could be going wrong. Are you using the same weed as before? Maybe try keeping it a bit longer in the over. I really have no clue what could be going wrong because it’s a rather simple process. You heat up the oven to 250F, once it reaches that temperature, toss in the dish and weed, pull it out in about 25-30 minutes.

      I suggest that you separate a little bit of weed, and not make butter from it, but just try it and see if you get high after the decarboxylation. Try the decarbed weed with something on the side because it will taste ashy, maybe it’s not even getting decarbed due to something weird…

    • Get an oven thermometer and check the oven temp. The setting should match the thermometer. If it doesn’t then you may need to set the oven hotter or run longer.

  29. Hello, thank you for your article. I am having a devil of a time finding out how to decarb tp maximize the CBD rather than the THC in homegrown. I have no idea what strains these are or how potent they are, but I want to maximize the cbd and whatever thc is left is fine, but we’re not looking to get high, just relaxed.

    Would I just decarb a little longer? Any suggestions or ideas ?

    • Hi, from what I’ve read, CBD and THC get decarboxylated at the same time because this reaction happens at a certain temperature, and then a carboxyl group and CO2 (carbon dioxide) get released.

      Preheat your oven to 230° F and bake the cannabis for up to 40 minutes, stirring every 10. This way you’ll get to keep more terpenes than decarbing for a shorter time at a higher temperature. That should do the trick.

      The only thing you could do to maximize your CBD intake that way is to go for strains with higher CBD content. Good luck!

  30. Hello great article, just had a quick question. The decarb graph suggests that you should decarb the weed for 7min at 300F, however every other reference in the article and comments was to do it for 25min at 250F. Wouldn’t it be more efficient to do it at 300 instead of 250 or is there a benefit to decarbing at a lower temperature like conserving terpens?

  31. Hi Alex, I just made my first batch of brownies. I followed a recipe on youtube. The way he decarbed the flower is by making a tea bag out of cheese cloth. He put the weed 3.5g chopped up in the cheese cloth ,twisted and tied. Dropped that into a 8oz masson jar with coconut oil. Into a pot of boiling water for 2 hours.After it cools a bit ,remove the bag and squeeze. I used a garlic press to get every bit out. Anyway the brownies came out awesome i guess. I tried to dose them at 50mgs each. My question is would i benefit from decarbing , the oven method , then putting that bud in the tea bag , in the oil and boiling for the 2hours?Wondering If i can get more potency that way. Thanks in advance….

    • Hey Dave, I’m not really familiar with that method as I’ve always decarbed inside of an oven. I really wouldn’t know, but I do know that my way makes the brownies potent enough so I don’t even experiment that much with other ways.

  32. I keep trying to find an answer for this question I have and it’s surprisingly difficult to get. If you decarb the weed and then make the canna butter, does the decarb process reduce the scent of the canna butter? Does it smell stronger than the canna butter?

    What’s the best way to reduce smell if it doesn’t?

    • From my experience, at the point where you get the weed in the cheesecloth and start squeezing and straining it that’s where most of they poor taste comes from. Thats because chlorophyll is also butter-soluble and the more you squeeze the cheesecloth, the more chlorophyll leaves the mix and goes into the butter. I don’t really know a way to reduce the smell of cannabutter effectively.

  33. Like several previous comments, I do not want the smell of decarbing weed in my house as not everyone in my household would appreciate it. I use a toaster oven in my garage I bought at a garage sale exclusively for this purpose.

    Be sure to preheat as advised in this article. Your toaster oven may heat way too quick and expose your weed at too high temp during the preheating phase causing burning weed. I allow it to preheat then wait for 5 – 10 min before adding weed. I prefer lower temp for longer time periods.

    I then infuse into coconut oil on the side burner of my BBQ but could also use camp stove – again in my garage since this also creates an odour. I use lots of water (at least 3 to 1) and continually add more during process. The boiling water basically acts as a substrate for heating the oil. Since boiling water cannot go higher than 212 degrees there is no worry about overheating oil.

    After boiling for 4 to 6 hour, I strain through cheese cloth into a mason jar. I stretch the cheese cloth over the mouth of the jar with an elastic allowing a bit of a pocket for the plant material. I gently squeeze the plant material once with the back of a spoon. Most of THC is infused in the oil and you will only add unpleasant weed taste into your oil by squeezing further. The oil and water instantly separate. Allow to cool and then put in fridge. The coconut oil will solidify on top of the water. I use a screw driver to poke two holes in the solid oil so I can drain off the water.

    My friend insists as other commentators have, that there is no need to decarb if infusing into coconut oil since you will be exposing it to high temp at which time it will be decarbing. Although I see the logic and he seems to have success, I prefer to slowly release the THC via the oven method and then infuse.

    You will find as many different methods as you find websites with decarbing / infusing instructions. I would suggest you find a method that works for you and stick with it. I make cookies with the coconut oil and very much enjoy the buzz as opposed to smoking.

  34. Hello! – My Q & Comment is that
    First, – I have several Oz’s of Quality, ‘Grand Daddy Purple’ Kief.
    Second, _ I experimented by adding the Kief to MCT Oil, then keeping it in a 250 Degree, Pre-Heated Gas Range for One Hour. – (Without ‘Decarbing’!)
    Third, – After cooling, we can take 5ml (or one teaspoon), and get VERY Relaxed or Sleep like a Log afterward, – (and very soon at that!) – Not so much of a ‘High’, but it is Potent!
    Four, – Any comments or answers on this method? – (Maybe a New Discovery!)

    • I have only one question: How do I get my hands on “several Oz’s of Quality, ‘Grand Daddy Purple’ Kief.”, because I would very much like to!

  35. Hi Alex, – Thanks for your quick reply!
    I have this amount of Kief because I created a ‘Kief Collector’, that will tumble our leftover Trim,(from our tasty buds, and the yield is amazing! – Approx. -3 – 4 Ozs of Kief from the trimmings of 4 -5 lbs of finished Medicine)
    (I’d very much love to sell the idea to someone who would put them into production, like HydroFarm, and make a few bucks on it)
    I live about an hours drive North of San Francisco, so if you’re nearby, I could get you some of this wonderful medicine to check out.
    Still tho, I am curious about my Original Question/ Statement:
    How does this method seem to work w/o Decarbing? –
    Have I discovered a New Idea? –
    (You can send a private email to the same address as below if you’d like) – Thanks, Pat

  36. Just one question for you that I can’t find an answer to anywhere else for some reason; is it necessary to decarb your bud when making cannabutter since you need heat to make the butter in the first place? Would it not decarb at the same time as it’s simmering in the butter?

    • I don’t believe so, I think the decarbing process is necessary every time before you plan on cooking things with it, even if it’s going to be heat processed again afterward. It won’t hurt to decarb it so why even stress about it you know?

  37. Hello! Article was super informative and I enjoy the charts for reference. Do you have experience with the magical butter 2e machine? It has a setting for 220f and can go anywhere from 1-8 hours. I see everyone say to decarb prior to using the machine without really saying why. My question is, if the machine has a 220f setting and keeps the heat there, can I add my raw buds into my refined coconut oil and decarb inside the oil, inside the machine? It seems like it would work

    • I don’t have any experience with that machine. I just use the oven, but I’ve heard people using all sorts of things, such as toasters, so it wouldn’t surprise me that you can use that machine as well.

  38. Hi, Alex and Patrick
    Alex, thanks for the advice. I was going crazy with so much disinformation. And I read a really long article about the myths of decarb and by the end,they were just trying to sell their product to use for decarb, and saying it was a myth that you can use an oven!! Sheesh Anyway thanks for the super easy,informative instructions. Worked great for making vapes. Also Patrick, I would love to check out your invention, sounds awesome and a great way to maximize every bit! I mean it’s only fun to make finger hash the first day you’ve ever trimmed, after that not so much.

    • Yes you should. The crystals are actually CBDa and should be decarbed for topical or oral applications. Take your crystals and dissolve in the oil you want to use. I like the hard coconut oil myself. Then heat the oil in a Pyrex container on an electric hot plate. (NO OPEN FLAMES)
      Use a candy thermometer clipped to the side and down in the oil to monitor oil temperature. Heat to 252 degrees for 25-45 minutes or until bubbles stop. Put the oil in the fridge to make it a solid again. Apply as needed.

  39. Hi please cud u tell me if decarbed weed can be stored and if so does it lose any potency of the thc?
    Thanks in advance 🙂

  40. Just here to point out that decarbing does not just produce carbon dioxide gas it also produces hydrogen gas the H does not stay behind like in your picture.

  41. So I am making mct thc tincture… Should I decarb before I start extraction. Will extract via slow cooker. . 8 to 9 hrs in slow cooker on low about 180 to 200 farenheith

  42. Hi Alex,

    I just decarbed half an ounce in a tray in the oven. Because most of the literature on the web is in Fahrenheit and I’m Aussie (using Celsius) I think I fucked up. I had my oven sitting at 300 degrees Fahrenheit when I put in the weed in but it rose to 320 degrees over 22mins before I realised that I was cooking it too high.

    Have I fucked it up?

  43. I recently broke a cartridge and was told I I had to decarb the oil before using it to make edibles. How do you decarb the oil in cartridges?

  44. Hi Alex,

    Good news! It is totally fine. But very much a long-lasting heavy body high. It also doesn’t smell or taste much like weed at all – perhaps the terpenes were the first to vaporise? Thanks for your reply.

  45. Decarb question regarding CBD hemp flower – I have some dried flower that has a nice THCa content and was planning on smoking it, but I read that smoking it will heat it at too high of a temp to convert to THC…is that correct? If so, would I be able to decarb in the oven and then make tea, to get the potency of the THC? Thanks in advance!

  46. Hi I just messed up royally I didn’t put in oven to reverb added it in oil before I realized it will it still come out good for edibles an how long should I let it cool on low heat???

  47. No one has answered this question for me: is it necessary to make canna butter or oil or can we just use the decarboxylated product in edibles?

    • Hi Laurel, you can use the decarbed product as it is, but the reason why we usually recommend cannabutter is because it’s easier to work with.

  48. HI I decarbed one once of cured 2yr old week was fine to smoke and had psychoactive affects, at 240 deg for 50 min. Ground it, and added 10 oz of organic mct oil, put all into crockpot for 23hours, and finished tincture has a burned smell and not any psychoactive affects. Any thoughts what to change next time?

    • Maybe your oven was hotter than it was actually set at. I usually set my oven at 225, but my thermometer will say 250. I usually decarb for 32 minutes to play it safe. Also my rule of thumb is for every quarter ounce I use 5.5 tablespoons. Also 1/2 teaspoon of liquid sunflower lecithin for 8 ounces of oil. I also prefer organic coconut oil.

  49. I’ve read I do and don’t need to decarb for vaping home made rosin because most pens don’t get hot enough to convert it. If it’s a waist of time I won’t but idk who’s correct?

  50. I decarbed at my usual time/temp for an alcohol tincture. I didn’t account for a new oven, and I didn’t decarb long/hot enough apparently. I only found out after trying my tincture (in Everclear). It has been recommended to me that I reheat in a water bath and top off if I feel too much alcohol was cooked off. I have searched the ends of the internet and I can’t find a good method to do this when it is already in alcohol (what time/temp is needed). I’d hate to waste $150 of weed, do you have any recommendations for saving this tincture?

  51. I ground up my product before reading instructions.
    Anything I need to do different? Shorter bake time or anything like that?

  52. I just want to thank you for posting this info. I bought some cannabis when canada legalized it, but I’ve since learned that I can’t smoke without coughing uncontrollably. I’m feeling optimistic about edibles though. I just finished decarbing my first experimental batch (a half gram, finely ground) at 230F for 40 minutes.

    If I didn’t mess anything up, that should be 60mg of THC in 6oz of chocolate fudge. I just put the decarbed bud into the fudge because I didn’t want to mess around with infusing oil

    thanks again for posting such clear instructions. I’m super excited to see how this turns out. I had a small taste and I’m already feeling some pleasant mild effects

  53. I prefer to make tincture. I do a very cold grain alcohol wash of the buds and strain through a coffee filter. I do two to three washes like this and put the alcohol in my counter-top still and boil off most of the alcohol but reclaim the very expensive grain alcohol to use over again with only about a 15% loss of alcohol.
    Once the still is cooled off, I remove the oil from the bottom of the still with a large syringe and place in a beaker sitting on my scale zeroed out. I have a hot plate with a stirring bar but any hot plate with a temp control will do. I then add the amount of coconut oil needed to dilute the cannabis oil as a carrier oil for proper digestion/absorption. I put a candy thermometer into the oil and heat on the hotplate at 252 degrees for 30 minutes or until bubbles stop forming. This drives all the alcohol away and decarbs the oil completely, while leaving the lovely terpenes and flavinoids intact. Very potent oil. Enjoy but.. Be careful! 😉

  54. I want to make oil that is NOT decarbed. I extract at 76C and depending on the batch size it can take 4-6 hours(at 76C) until all alcohol is recaptured/evaporated. Your chart states that at 80C there is little to no decarboxylation after 1 hour for flower or hash(but no figures for oil). I have found another study that shows a chart pretty much the same as yours. One could deduce (from the charts) that at 80C decarb will not occur no matter how long the time frame is. This just doesn’t seem logical to me. The reason for my inquiry is quite simple.

    For those who inhale their medicine, one would assume that if they inhale oil, they would want to inhale oil that is NOT decarbed so that decarbing occurs at combustion….not during extraction. The same logic goes for flower….who would decarb their flower before combustion?….no one.

    So I have two questions for you.

    1- At 80C how long does it take for full decarb to occur? (your chart doesnt go past one hour) I am guessing you dont have an answer to this as I have exhausted all avenues trying to answer this question…..but maybe you can pull a rabbit out of the hat for me here.
    2- If oil has already been decarbed through the extraction process, does it lose any of its beneficial properties when decarbed a second time at point of combustion? This is a question I cant even get a close answer to….yet.

  55. From how i understand it THC vapourises at 180c.so i prefer the low and slow method of decarboxilating.i set the oven at its lowest setting (gas oven).then i just give it 15 mins and then just keep checking every 5 mins till it feels dry.go above 180c and you will lose all the thc.

  56. Grate article. Thanks. So I am medical grower and have a lot of “sugar trim” very small pieces of trim sifted off the buds ( I hope that makes sense) I want to make some oil for both eating and salve. since the herb is very small, almost ground, should I heat for a shorter amount of time? Also I have both high CBD and High THC strains. is the Decarb process the same?

    thx

Leave a Comment

Please confirm your age

Are you over 19 years of age (over 18 in Alberta and Quebec)?

By entering, you agree to Greencamp's Terms of Service and Privacy Policy.

×