It’s common for bags of potting soil to harbor gnats and other insects ... Using old potting soil without refreshing it.
6 DIY Tips for Getting Rid of Fungus Gnats Without Chemicals Getting Rid of ... A universal tip: Quarantine new plants and ...
It’s common for bags of potting soil to harbor gnats and other insects, egg sacks, larvae, or seeds. It can also attract pests, including rodents and insects, that feed on organic matter.