Darkness before harvest

Nutty sKunK

Well-Known Member
Now I’ve heard of this before and never thought too much of it. But after reading a little it makes a lot of sense. Regarding the degradation of thc in uvb light.

Anyone tried this/noticed any difference.


Stichting Institute of Medical marijuana (SIMM), the first company to sell marijuana through the pharmacies of Holland, has been investigating the medical possibilities of cannabis, together with TNO laboratories and the University of Leiden.


One of their discoveries has been that to keep the ripe plants in the dark before harvesting could increase their potency.SIMM’s growers separated a crop of mature plants, harvested half of them and kept the other half in absolute darkness for 72 hours before cutting and drying. Analysis of the resulting dried buds showed that some varieties had seen an increase of THC of up to 30%, while CBD and CBN remained the same."

Thc degrades in light. Thc is used by the plant as a sunscreen, primarily to deflect UV-b which damages the molecule. The thrichomes are refracting sunlight away from the plant protecting it from the damaging uv-b. The plant produces these trichomes in the twilight hours before sunrise in order to protect itself from the sun. Extending this twilight dark period allows for the plant to continue producing thc without it being damaged by light’
 

nc208

Well-Known Member
Now I’ve heard of this before and never thought too much of it. But after reading a little it makes a lot of sense. Regarding the degradation of thc in uvb light.

Anyone tried this/noticed any difference.


Stichting Institute of Medical marijuana (SIMM), the first company to sell marijuana through the pharmacies of Holland, has been investigating the medical possibilities of cannabis, together with TNO laboratories and the University of Leiden.


One of their discoveries has been that to keep the ripe plants in the dark before harvesting could increase their potency.SIMM’s growers separated a crop of mature plants, harvested half of them and kept the other half in absolute darkness for 72 hours before cutting and drying. Analysis of the resulting dried buds showed that some varieties had seen an increase of THC of up to 30%, while CBD and CBN remained the same."

Thc degrades in light. Thc is used by the plant as a sunscreen, primarily to deflect UV-b which damages the molecule. The thrichomes are refracting sunlight away from the plant protecting it from the damaging uv-b. The plant produces these trichomes in the twilight hours before sunrise in order to protect itself from the sun. Extending this twilight dark period allows for the plant to continue producing thc without it being damaged by light’
Right so since this says its UVB related and most indoor lighting doesnt include UVB(outdoors would) how would this make much sense?

Would this only apply to outdoor crops?
 

Nutty sKunK

Well-Known Member
Right so since this says its UVB related and most indoor lighting doesnt include UVB(outdoors would) how would this make much sense?

Would this only apply to outdoor crops?
MH, some hps and pretty sure some LEDs produce uvb.

So it would apply to what light you’re using indoors.
 
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