[ganjaments]

Spurr, thank you very much for your input in this thread and the documents in the other thread, it is greatly appreciated. It looks like I have quite a bit of reading to do!

[spurr]

Originally Posted by MrBlue2

as stated above a green LED is uv free. I use a green LED because the plants dont react to it and it will not interrupt their photo period.

FWIW, the thing we need to worry about in terms of interrupting the plant sensing length of dark hours, and interrupting flowering, is far-red light of ~720-740 nm (i.e. "phytochrome B"; aka "far-red phytochrome" abbreviated as: "Pfr").

[spurr]

Originally Posted by ganjaments

Spurr, thank you very much for your input in this thread and the documents in the other thread, it is greatly appreciated. It looks like I have quite a bit of reading to do!

Glad to be of assistance

[Cannabologist]

https://www.icmag.com/ic/attachment....5&d=1295218736

- This was one paper I uploaded on conversion rates... There were some others I was looking into also... More info later...

[spurr]

fwiw:


"Cannabis sativa L.: Effect of drying time and temperature on cannabinoid profile of stored leaf tissue"
C.B. Coffman, W.a. Gentner
Bull. Narc. 26(1):68-70 (1974)
https://www.unodc.org/unodc/en/data-a...1_page006.html

[pezmasterelite]

Hi all,

I believe the production of THC in the cannabinoid biosynthesis is directly liked to the photosynthesis taking place( ref. Marijuana Botany - Robert Connell Clarke ).

That being said, the time of day one pics their herbs has a similar effect as picking an 8 week strain at 7 or 9 week.

The overall cannabinoid ratio is affected by the amount of maturation in the buds. The daily/current cannabinoid ratio depends on how much photosynthesis is taking place at a given time in the plant.

Picking when photosynthesis is at a peak, the plant will be producing THC at a max rate for that given day giving the highest ratio of THC/(other cannabinoids). If you pick when the plant is not photosynthesizing or at the point longest from when it last produced any sugars and hence THC, then you will have the lowest THC/(other cannabinoids) ratio.

As for how the plant changes it's overall cannabinoid ratio in maturity days, or how the plant changes it's cannabinoid ratio daily according to it's photosynthetic cycle is as I see it a mystery and completely up to the genetics of the plants being considered. I would imagine mostly plants of similar backgrounds act similarly, and I would also imagine that all strains are not too different in how they behave overall.

I am not certain of any technical information regarding the rates or max/min that these ratio's go through, but I am sure it exists in some form or another. I am also fairly confident that my knowledge on this subject is from the R.C.C. book referenced above or possibly from Marijuana Chemistry by Michael Starks.

A good place to look for the technical info that is desired would be to look at the references for those books, good luck on the R.C.C. bibliography, it is enourmous, that is why one can trust the info in his book.

Good luck on the search, this is my 2 cents.

Peace

[ogkushkilla]

Originally Posted by ganjaments

Do you have a link for this? It was my understanding that people harvest before lights on to obtain peak potency, before it has a chance to degrade from HID's?


So a UV-Free lamp would be the best to use during and after harvest?


Some people are pretty anal about light exposure (ever see a duct taped stash jar?), and having hard data on this would be quite helpful to quantify those concerns.

Hey i think your missing the whole idea of this. The only reason you harvest at night is because of the starches that you dont want in your plant. it has nothing to do with thc degrading...

Also no a lamp is not good for your bud because it makes it dry to fast before your bud has cured properly. you want your bud to under go a chemical reaction during curing , all a lamp dose it dry it out.
And the whole thing about the jars with duck tape. its not to keep light out but Air in.

Just harvest your bud and hang it somewhere normal with good ventilation then after a week or so put them in jars for a minimum of a month.

Curing is part of your grow time don't cheat your final product!!

[wemary]

interesting

[compost]

I always harvested at the end of the light period. Just following what I had read in a REAL bible. However there is some bad info in the book. Would anyone like to elaborate when is the best time to take the plant down in its light/darkness cycle?

[hippydan]

Originally Posted by compost

I always harvested at the end of the light period. Just following what I had read in a REAL bible. However there is some bad info in the book. Would anyone like to elaborate when is the best time to take the plant down in its light/darkness cycle?

It's already been said multiple times in the thread. The whole point of harvesting a plant during the dark cycle is to get it when the majority of starches are in the plant's roots, and not in the buds themselves. If you're going to flower a plant for 55+ days, what is one more light cycle going to do for potency in the grand scheme of things? Sure it might be slightly more potent, but it's going to be harsher smoke.