Neem oil questions

[Stealthboat]

Been looking for answers and have come up empty so far. Here's a few questions:
1. I've heard Neem is systemic but have yet to find confirmation for this. Is it systemic? And how efficient is the systemic method when compared to the foliar application?
2. When can I begin using Neem on a young plant? After 4 nodes have appeared? After 4 weeks? After clones have taken root well?

 

[kraw420]

Question one, You are correct, neem oil is a systemic insectcide.
Question two, Neem oil foliar spray has been shown to be most useful when applied to young plant growth. The oil has a half life of 3 to 22 days in soil but only 45 minutes to 4 days in water. It is nearly non-toxic to birds, fish, bees and wildlife, and studies have shown no cancer or other disease causing results from its use. This makes neem oil very safe to use if applied properly.

 

[Stealthboat]

Cool, thanks for the info

 

[kraw420]

Anytime,
As for which application is better, well that depends on the reason(s) for application as well as personal preferance.