Make sure when spraying you get the under sides of the leaves.
Neem takes around 30 days to break down.... so
use like 5 weeks or so before harvest and itll last you up till harvest and be broken down by the team you dry and cure.
I have recently used it as a soil drench on my plants since it is systemic.
BEWARE WHEN SPRAYING. DO NOT SPRAY IN DIRECT SUNLIGHT, OR ALL YOUR LEAVES WILL BE BURNT TO A CRISP.
http://www.420magazine.com/forums/h...m-oil-without-getting-my-plants-all-oily.html