The Science of Drying and Curing - Allison Justice, PhD

Tags: drying, curing, water activity, humidity, terpenes, cultivation, cannabis

Allison Justice, PhD presents "The Science of Drying and Curing" at CannMed 2022.

Drying and curing is an extremely important step to smokable flower production. In this session, the science of drying and curing will be discussed. Traditional methods and current research covering everything from gas exchange to water activity will be discussed.

[GalacticFarm]

I’ve been growing in Humboldt County most my life. I’ve also been learning a lot about the science behind these processes which we have been participating in. Dr. Justice is one I’ve been following since legalization, and she does not disappoint. Folks like me really appreciate this science that’s being done, it’s helping me understand my own craft so much more. Thank you!

[GrowOhio-gyrs]

Amazing talk! It’s refreshing to see such a great attitude toward cannabis research. It’s a great time to explore the science of cannabis and cannabinoids.

[Reversed]

extremely grateful for the insights unlike some of the know-it-all commenters here. particularly that drying time can be kind of modelled by VPD is awesome, i used it on my first grow (just legalized in germany) and it worked perfectly. did not use the stem snapping method at all, just calculated drying time, then checked equilibrium RH in a jar and everything went smoothly.
also, i'm sure there's a lot to still discover and improve, hopefully also for homegrowers, freeze-drying will probably never be an option here but maybe some middle ground can be found.

[smoothee.stashjar]

This is an amazing presentation—thank you for sharing! Fascinating research around terpene preservation 👏

[glmor]

I work for cannabis industry for 2 y now,
I find this video very interesting informative
And well researched

[terryharris]

The chart at 15:34 contains data (temp and RH) that can be used in Tetens’ equation to calculate the VPD data shown on that chart, as well. However, the data shown in the table at 15:44 can not be reproduced with Tetens’ equation. Its close but not within any reasonable rounding error. How were the VPD values in this chart calculated? Thanks

[lovefortheplant]

She brought up some great things to think about. Thank you for sharing 💚🌱💨

[CharlesSchlener-xb]

Ty for this video I watched you for the first time on garden talk. Keep shooting for the stars

[danielmonteiro]

Amazing knowledge. Learned Lotts! =) ❤ plus.. she smiles ;>

[soldierscotty]

Veteran growers agree a 6 month cure is optimal. I agree. I have in fact smoked flower that was cured and stored properly that was over a year old. Great smoke!

[growland]

Optimal curing time depends a lot on the strain and terpenes profile, as shown here all terps do not react the same to drying, it is the same for curing, some fruity terps fade in a month, some other need a month to reveal. Terps volatility might be linked to chemistry. thanks for the video !

[weissefabrik]

The comment on the boveda stuff was perfect. thank you for that ;)

[tremdawg]

7-14 days at 60 something percent humidity and 60 something degrees…. I usually take the larger leaf off before drying. I also use the “stem snap” method

[CharlesSchlener-xb]

I’m going for an 8 day dry in my indoor tent. Temp is 58-60F /RH was at 58 now down to 51 on day4(due to not using my humidifier only dehumidifier)chopped squatty indica dominant plants in half/cut off all leaves with a visible stem and left the rest of the sugar leaves to gain higher RH and hung in the dark with 3 fans isolating below buds and exhaust fan to only kick on when humidity rises above 60RH. On day 8 I plan on bucking the buds and putting them in an ac infinity dry rack obviously rotate the buds while I check on em after 12 hours or so. I’m hoping by doing this the moisture will have a better chance to escape the center of the buds. After inspecting buds after day 8 in the dry rack I will decide if they’re ready I feel I’d like to but them in a paper bag for 12 hours after they dry rack only if they’re ready buds seem very moist still and then I’ll drop the buds half in grove bag and half in a jar with small humidistats to verify humidity in containers. Also it’s possible that burping needs to be done because you want the moisture in the bud to equalize. Hope this helps anyone. Ty again for the video mam

[fellsmoke]

Actually in my opinion a properly dried and cured product is not bright green...off green is fine...chlorophyll need to be degraded, to improve flavor and smokability...

[HappyBirdGenetics]

This is great info, thank you for sharing!

[Mayberry_Mafia]

She is so cute that it made it easy to watch the whole thing.

[TriStateTrichomes]

Is there any update on any of these follow up testing mentioned? I can't find anything on her website.

[grigoriofabrosi]

It's worth mentioning that despite what lab tests tell us, different people reach different conclusions in their personal experience and preferences; whether they are right or wrong, their personal taste informs their opinions of what works. They can be both technically wrong and experientially right.

[Frostyfarmer]

I put in as much work into drying and curing my bud as i do growing my beautiful girls . i get my drying environment as close to 68 degrees Fahrenheit and the relative humidity as close to 62% as I can get it . Once the bud is dry i put it in jars i put it in so their is air between the buds i wait 2 hours and then i start burping everday at the same time i brup till the flower is stable at 62% humidity and then i put it in a cool dark place for 1 month. I check it all the time to see if the meter says 62 % if not it might need a boost pak or burped i have seen people grow real nice flower just to ruin it when curing . Its so important to get it right.