leaves are a burnin'

how far is ur light from plants? i put my 400w no more than 17-20 inches away and i have a fan blowing air up at light

bake508 said:

how far is ur light from plants? i put my 400w no more than 17-20 inches away and i have a fan blowing air up at light

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hi bake
there roughly 10-12" from tops
i also have a 400w and last night i put a fan in blowing at the light to see if it will help.

been doin a lot of l.s.t. because the are growing fast and too close to the light as the light cannot be raised any further.

Same thing happened here. I think the boost causes toxic levels of P & K. My leaves started to go yellow with burned spots suggestive of nut deficiency (or toxic lock out). I'll never use Boost again.