Lauren writes
I have a fungus gnats problem, and am worried that eggs may be in the soil. Is spraying the soil helpful or harmful?
Bonide All Seasons Horticultural Spray Oil is applied to the plant itself not the soil. Normally just allowing the soil to dry out completely would be enough to kill anything in the soil. You should read our "Getting Rid of Fungus Gnats" article that explains how to treat fungus gnats.
Answer last updated on: 11/27/2022