Quote Originally Posted by SlickDick
I have an unknown sativa strain growing under cfls. Not the cleanest or most expensive set up but i dont have much money so it's all I've got. Shes about 6 weeks into flower, but around week 4-5 began developing problems. She has Yellowing veins which spread out to cover the whole leaf before the leaf inevitably dies. Also even the leaves which appear healthy are curling downward and have yellowed tips, although no yellow tip is more than one milimetre long, and a few are developing small spots on the leaf itself. Each cola just feels flimsy, some even bending over, although that could be due to weight, it has a thin main trunk. I really dont know where else to turn, so Thanks for any help you guys can give
sativas aren't the best choice for fluorescents. they have a tendency to be stretchy and rangy. tip burn usually means over ferting. what kind of nutes you using? ph? pics would really help.