Originally Posted by Carraxe
Any scientific background supporting that?
I've read a lot about UV in growing weed and I've found contradictory results.
Yes but its a bit complicated as published cannabis research is still lacking a bit and loads of people have thought UVs to be a holy grail and kind of applied them wrong.
If you search for genetic effects of uvs on plants on ncbi.com you'll find lots of research in this field, imo the research on other plants is applicable to cannabis. It is widely proven and acknowledged that in all plants that produce terpenes/phenols/flavonoids/alkaloids etc protective secondary metabolite substances (which i think is all plants?) uvs induce epigenetic changes that increase a range of antioxidant protective substances based on the intensity of the spectrum at different bands. It appears from a glut of studies the UVs modulate the terpenes based on which absorb at the exact spectrum you are hitting them with.
If you know the absorbance spectra of the terpene you want you can increase it by getting diodes that hit that peak because the plant upregulates its synthesis obviously. This will come at a cost to energy going into other terps. Basically one of the big differences between ganja grown outside in different parts of the world. Like that amazing hawaiian weed, anyone ever thought about passed on genetic changes from that lovely Hawaiian sun and sunsets..
Cannabis isnt very different at all from basil or thyme or rosemary, mint etc etc in this regard.
Also the far red and infrared spectrum delivered in the dawn light helps plants use the UVs throughout the day without being harmed as much or at all.
Honestly I rarely run around providing research for anyone.. ive done too many courses and it triggers me to be forced to provide research papers for someone.. fucking dissertations..