I have a lovely fir-pine tree (about 2 ft. tall)that was given to me when Bill first becamee ill. It's been doing awesome until I re-potted it about 2 weks ago.
Now the soil is infested with what looks like small gnats. I tried a spary for house plants and also sprayed soil with peroxide. Not working. Any other suggestions? I don't want to have to use new soil and re-pot again. Thanks.