Q. Is there a way to prevent those tiny black gnats from coming out of potting mix without spraying my houseplant?
Fungus Gnats are common nuisance pests in houseplants often found in the surface soil. There are a number of natural controls that do not require harsh chemicals. Many times fungus gnats thrive in moist soils by keeping your soil on the dry side it will discourage them from breeding. Watering plants from below will keep the surface dry but provide plants with necessary moisture. Watering the surface with a little castille soap mixed in water can get rid of the gnat larva -it usually takes a couple of applications to get rid of all of them. Alternatively there are natural controls such as nematodes and traps that can be purchased from online suppliers that help rid you of these annoying pests.