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Appreciation post: those sticky yellow gnat traps actually work, and I ignored them for two seasons
I always figured those little yellow sticky cards you see in greenhouse supply shops were just a way to part new plant owners from their cash, because bugs fly, right, how is a piece of cardboard gonna catch anything. Last February I brought home a monstera from a nursery outside Rochester and within a week the soil was crawling with fungus gnats, so bad that my partner started calling the plant room the bug room. I tried drying out the top two inches of soil, I tried cinnamon, I tried a layer of sand, and the gnats just kept coming back every time I watered. Then a guy at my local garden center handed me a 10 pack of the yellow cards for 8 bucks and said to cut them into squares and stick them right at soil level, not up high like I assumed. I put 3 squares in that monstera pot on a Thursday and by Sunday morning each card had maybe 30 or 40 gnats stuck to it, which finally told me how big the problem really was. The cards didn't fix it alone, but seeing the count drop week by week let me know whether the mosquito dunk tea I was watering with was doing anything. So here's my question for anybody who's fought these things before, did you ever get fully free of them, or is it just a permanent low level truce once they're in your house?
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