yea neem oil is pretty good stuff, all organic, just make sure to get a wetting agent with it so the oil mixes w/ the water...I used it for white flies in 2nd week of flowering and have been ok since...you might want to ask about spraying it when your plants are actuallu budding though... because the shit smells aweful! but the smell goes away in a couple of days, youll probly have to spray twice a week for 2 weeks