Fungus Gnats are a common problem for plant lovers! Bye Bye Fly is a natural, non toxic, and effective solution. Simply shake Bye Bye Fly on to the top of the (dry) soil in a thick layer. Fungus Gnat larvae will not be able to survive in the soil and their life cycle will end. Treatment time can take 4-6 weeks and we recommend bottom watering during this time, as Bye Bye Fly is not effective when wet.