The Q&A Archives: nats

Question: I have a plant with decorative rocks over the soil. I have noticed nats flying out of them when I water it. Could the rocks be causing this?

Answer: What you describe sound like fungus gnats. They are living and breeding in decomposing organic matter at the soil surface. They thrive in moist places so beneath the decorative rocks the soil is damp. Generally the rocks will serve as a barrier between the gnats and the soil so perhaps you should add more decorative rocks to the area to make a thicker barrier. The gnats do not feed on plants or lawn and they won't bite you but if they are bothersome you can use an insecticide to kill them. Bayer Advanced? Complete Insect Killer For Soil & Turf is one of the treatments you can find in your local garden center.

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