Tiny Black Flies on Purple Passion Plant? Fungus Gnats—Easy Fix

Getting Rid of Fungus Gnats on Gynura (Purple Passion Plant)

Steph's new purple passion plants are attracting tiny black flies resembling fruit flies. She wants to know what they are, how to eliminate them, and if they bite.

Diagnosis and Treatment

Kristina identifies them as fungus gnats—common in overly moist soil. Her proven remedy:

• Mix 1 capful Murphy's Oil Soap per gallon of water
• Apply as a soil drench once a week for two weeks
• The oil smothers larvae; total elimination takes a few weeks

Fungus gnats don't bite humans. The key is reducing soil moisture long-term—let the top soil dry between waterings.