For non-systemic insecticides for which soil contamination is a problem, I flush the pot with rainwater after I've sprayed.[b said:Quote[/b] (Bugweed @ Jan. 26 2006,9:01)]Guilty? What! You care!?!?!?!? Good! Do it. LIGHTLY spray with this stuff and do it in shade. Sunlight mixed with this stuff could burn the leaves. Spray, VERY FINE mist, leaves only. Some will drip into the soil I'm sure, but it hasn't killed any of my sarrs yet.