Black Spot Fungus on Plumeria: Trim, Sanitize, and Spray

Black spots on plumeria leaves are a fungal disease, similar to black spot on roses. High humidity and rainfall encourage its spread.

Management Steps

1. Trim off affected leaf sections using clean scissors dipped in 10% bleach solution.
2. Keep soil on the dry side; avoid overhead watering.
3. Spray with a fungicide such as Ferti-Lome Triple Action Plus (controls fungus, insects, mites).
4. Repeat weekly for 3 weeks to prevent recurrence.

With consistent treatment, your plumeria should recover and produce healthy new foliage.