I have a small 1.5'w x 1.5'L x 2.5'H box the top 6" has a 70W HPS inclosed with glass and a CPU fan in the top. Is that enough for a single LST grow for a decent amount or should add some CFL's to the top or what? Thanks.
When you have nute will it cause the leaf to yellow as well the very tip to burn or just the tip burn and the rest of the leaf stays green? And does it affect the whole plant or just old/new growth? thanks.