Controlling House Flies in Hibiscus Soil: Dryness, Sticky Traps, and Soil pH

Fly Infestation Source

Flies and larvae breeding in hibiscus pots indicate consistently wet soil. Fungus gnats and shore flies thrive in damp, organic-rich mix.

Cultural Controls

• Water by weight: Water thoroughly, let drain 10 min, pour off excess. Rewater only when pot feels light.
• Dry cycle: Allow soil to dry ¼–½ down between waterings.
• Yellow sticky cards near plants trap adults.
• Top-dress with 1 tsp garden lime per pot to raise pH—acidic soil attracts gnats.

Safe Treatments (Bird/Child Safe)

• Safer Soap (potassium salts of fatty acids) applied as soil drench per label.
• Mosquito Bits (Bti) sprinkled on soil—kills larvae, safe for birds/pets.
• Beneficial nematodes (Steinernema feltiae) watered into soil.

Avoid Diazinon (banned) and foggers. Consult a local garden center for bird-safe products.