How early should you start using insecticides?

I have some seedlings right now and I want to know how early I should start using pesticides.. all organic. Is it dependent on the brand?

I apply the second once they're outside. I might spray them once they have their first set of 3 fingered leaves but i never keep them inside for long I only start them indoors then transplant to outdoors. I've never had any problems and since your is organic its just that much more unlikely to cause problems. Make sure you spray under the foliage not just on top... very important.

THanks! I was waiting for answer for a while.. I'm about to use it right now.. I looked under the leaves and I already saw what looked like little tiny bugs clinging for life to the leaf.. little fuckers

What organic insecticide are you using?

There you go dood. I remember the first time I used insecticide I kind of ignored the bottom sides of the leaf and didn't really think anything of it. When I actually did get around to checking the bottom of the leaves I noticed bugs too. Sometimes I swear the bottom is more imporant sometimes, depending on your situation.