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plants use CO2 and put out oxygen. i have read that they photosynthesize all day, using CO2 and water to produce sugars which the plant then uses at night to grow. i also read that 1500 ~ 2000 ppm is ideal for cannabis.:leaf:

i don't grow this stuff to satisfy control groups. to say that the fact you get higher isn't important is a bit comical to me.

i guess all of that is a little over my head. all i'm trying to accomplish with the uv-b is an increase in trichome production. i haven't noticed any effect on plant growth at all, negative or positive. but the increase in trichomes and hence the increase in thc production is astonishing. and...

you can avoid all the heat if you use cfl bulbs. the heat they generate is pretty much from the ballast in the base. i have mine approx. 5 to 15 inches away from buds with no problem.

from what i have seen, on my next grow i will add them on day 1 of flowering. i have no scientific observations to offer but i had a close friend and mentor grow clones of El Monstruo for 3 years. i have finally started my own grow room with clones supplied by my friend. the final product from...

I believe UV-B ranges from 280 - 320 Nm.

by the way, you should probably veg for at least 8 wks, depending on your light intensity.

i looked at the fox farms website, got their suggested feeding schedule, and then found stuff out there with about the same n-p-k for a fraction of the cost. i am 9wks into flower of my first grow and i've got some sativa buds that are reaching for the floor they're so heavy. also want to...

probably need nitrogen. just be very stingy and introduce any nutes very gradually.

Hello, if I could put in my 2 cents worth, anyone who goes to all the trouble of growing some decent herb is really doeing themselves and their babies a great injustice if they don't add in a little UV-B to their grow. Why do you think all the good weed comes from places with high UV-B exposure...