question: 400w MH distance from seedlings

desolation88

Well-Known Member
Whats up riu! Coming back from a small hiatus and ready to get my grow rollin, but i cant remember how far from seedings i need my mh to begin. They have sprouted the first set of fan blades 2 days ago but from fanblade end to end on both sides its only half an inch, about 6 days from breaking ground. My balast has a dimmer, I know to start it at 50% power, but how far should i have my light above my girls ? And as far as nutes, i don't nees to feed them until the get the first full set of fan blades and begin to shed the cotyledons correct? Thanks guys for answering my rookie question in advance,havent used my mh/hps for a few years!
 
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