I was going to start a new thread with this question but thought it might be more terse to just bump this one.

I want to pre-treat my healthy young plants with neem to repel spider mites. I know to put a thin layer of neem after each watering during veg mode, but can you to start the applications too early? My plants are about 2 weeks old, have 3 nodes and just sprouted leaves of 5. Should I start the treatments?