Gnats In House Plant Soil - Knowledgebase Question

Cheney, WA
Question by stefanirossi
April 9, 2001
I'm no green thumb, but I enjoy the fact that my house plants have been growing in what seems to be health. As soon as the weather started warming up this year, I've been noticing an abundance of small flies/ gnats enjoying my apartment. They seem to originate from the soil of my plants, and are rather indiscriminant as to which plants they'll inhabit. Any suggestions on how to get rid of them without doing anything to poison or stunt the growth of the plants?


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Answer from NGA
April 9, 2001

0

It sounds like fungus gnats are living in the potting soil. There are several ways to control them. They breed in wet soil, so topping the soil surface with a layer of coarse sand or gravel will create a quick drying barrier. You can also treat the soil with a drench galled Gnatrol. Either way, the adults will live out their remaining week or so and there will be no subsequent generation to replace them.

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