neem is the best. I notice huge growth spurts after i spray my plants, even when they are not infected with bugs. Neem will naturally be destroyed by the UV light after 2 weeks, so i use it on all my plants all the time except during the last 2 weeks of budding. It will make your plants shine. I think it helps retain moisture as well. The great thing about neem is that its beneficial for humans and is used in modern health care in the middle east, and only affects the bugs that feed on your plants. It can also be sprayed or watered in with your rootball to help prevent root rot. It can also be put in the res and used as a systemic. the plant will absorb it and less sprays are therefore necessary. I spray mine about every three days because i have so much new growth all the time. It will take a while to get rid of bugs because it doesnt kill them, it dissuades them from eating, prevents mating, changes their hormones, slows their behaviors, and deforms their larvae. Because it acts on so many levels it doesnt selectively kill like many pesticides and will not therefore create a superstrain of resiliant bugs.