Any tips for dealing with fungus gnats? (feddit.online)

submitted 3 weeks ago by tuckerm@feddit.online to c/houseplants@mander.xyz

15 comments fedilink hide all child comments

Some fungus gnats have showed up, and unlike what some blog posts have said, they don't seem to be attracted to apple cider vinegar. Has anyone found a trap that gets rid of these little things? I've put the plants outside for now, hoping that will dry them out and make the flies fly away.

you are viewing a single comment's thread
view the rest of the comments

[-] cb900f_bodhi@fedinsfw.app 6 points 3 weeks ago

I've tried a lot of methods. I haven't eliminated them but they are no longer a nuisance.

Hydrogen peroxide 1:4 in water will kill the larvae in the soil. Unfortunately, it also kills some plants like parsley, thyme, oregano.

I add some pea gravel, sand, other grit to the surface of the soil when I bring my plants indoors. That seems to help deter them.

I see the most results with sticky yellow paper traps you can get off Amazon. They're cheap, effective and one sheet will last about 4ish months. Helps keep the numbers of adults down.

[-] egrets@lemmy.world 3 points 3 weeks ago

Hydrogen peroxide 1:4 in water will kill the larvae in the soil.

Probably worth mentioning the concentration of the H2O2! 3%, I guess?

[-] cb900f_bodhi@fedinsfw.app 2 points 3 weeks ago

Sorry about that. Yes, 3%!

this post was submitted on 16 May 2026

50 points (96.3% liked)

Houseplants

6684 readers

1 users here now

Welcome to /c/houseplants @ Mander.xyz!

In between life, we garden.

About

We're a warm and informative space for plant enthusiasts to connect, learn, and flourish together. Dive into discussions on care, propagation, and styling, while embracing eco-friendly practices. Join us in nurturing growth and finding serenity through the extraordinary world of houseplants.

Need an ID on your green friends? Check out: !plantid@mander.xyz

Get involved in Citizen Science: Add your photo here to help build a database of plants across the entire planet. This database is used by non-profits, academia, and the sciences to promote biodiversity, learning and rewilding.

Rules