I've really been struggling with gnats every time I try to keep houseplants. The only time I managed to avoid them was with a fiddle leaf fig I had for about 5 years. However, after I brought home a clipping of two plants, I ended up with a terrible gnat infestation! I tried various methods to get rid of them, but they just kept coming back. The last straw was when I left my TV on overnight and found over 30 dead gnats behind the screen the next day—almost ruined my 65" TV! I eventually got rid of all my plants, but I really want to try again. How do you all keep your plants gnat-free?
5 Answers
Fungus gnats are actually one of the easier pests to deal with, thanks to products like 'Mosquito Bits' or 'Mosquito Dunks'. Just mix those into the soil and you can get rid of them with just one or two treatments. Also, if it's summer, taking your plants outside can help as natural predators usually keep pests at bay.
It could be a climate thing! I've only dealt with gnats once, and that was from a plant that came with them. All my other plants have dried out before I needed to water them, so it might be beneficial to keep your plants less moist to avoid attracting gnats.
Have you thought about using Bacillus thuringiensis israelensis? It's a natural soil bacteria that can target insect larvae but is completely safe for humans and pets.
You might want to try those little red gnat traps that look like apples. I had a similar issue, and using just 2-3 of those over a week really helped clear them up. If you're looking for a more aesthetic option, sundew plants are beautiful and can act as natural gnat killers; just remember they need some special care.
I mostly go for succulents and cacti, and I've never had gnats at all! I think it's because they require drier soil, which keeps gnats away. If the soil doesn't stay moist for too long, you're less likely to attract those pesky bugs.
That's a solid point! Moist soil definitely seems to be a gnat magnet.