Jade Plant Black Spots and Leaf Drop: Sooty Mold from Scale

Sudden black spots and leaf drop on multiple jades suggest sooty mold growing on honeydew from a scale infestation—not a primary fungal disease.

Identify Scale

• Look for 1/8 inch oval discs on stems/leaves (off-white to dark brown).
• Juveniles = tiny white flecks in branch crotches.
• Sooty mold = black, dusty/oily coating, not wet.

Immediate Action

1. Isolate affected plants.
2. Scrub adults off with soapy water.
3. Dab juveniles with 70% alcohol.
4. Send close-up photo for confirmation if unsure.

Spread Risk

Scale crawlers move to nearby plants. Quarantine and treat all jades in the area.