Treating Powdery Mildew on Grape Ivy (Cissus rhombifolia)

A grape ivy over a year old was faded and droopy despite location changes.

Diagnosis

Likely powdery mildew (white dusty coating). It kills grape ivy (unlike on outdoor lilacs).

Treatment

1. Spray entire plant with Lysol (hold ≥12 inches away, cover front/back of leaves) twice weekly until cured.
2. Move to sunniest available spot.
3. Be very careful not to overwater.