two questions

when do i start feeding nutrients to my plant? its lemon kush with CFL lights/. At night Does it have to be dark like blacked out or can there be enoguh light to read by? I heard its ok to have a small bit of light. Thanks for your help.

in veg..not a big problem. don't do it in flower.

what are you growing in?

presuming your in soil, you shouldn't need nutes for approx. 4 wks, and then feed small dosage gradually increasing, better to go slow rather than nute your plant half to death. Does depend on your soil though. As ringsixty for the lights. Def not in flower.

I start giving nutes after the 5th node has grown, this is usually around week 3 or 4. If your plant starts showing a deficancy before that much time has passed then start with nutes but start with a very low dose and gradually increase over time. As has been said just don't expose the plant to light during its flowering dark period as this will cause the plant problems. Cannabis produces a hormone in the dark that dissipates when exposed to light, if this hormone reaches a certain level it triggers the plant to flower, having light leaks during flower will cause this hormone to not reach the needed level and can cause the plant to hermie or reveg.

Lemon Kush that's 2 weeks old in Fox Farm Ocean Forest, under 400w MH atm, using the fox farm orgaic nutrient line. So I already fed once like the calendar said, so I'll just wait another week before I start again. I'll make sure to keep feeding N during the stretch. Then switch to the bloom nutes during flower. Thanks guys for the help. This is my virst grow. Sorry for the obviously nooby questions. +rep to everyone. tyvm

Oh, and I blacked out the closet completely. ANY light during dark is a bad idea I guess.