Black Spots on Outdoor Jade Plant: Seek Local Expertise

Black spots on a jade plant living outdoors on a Florida lanai fall outside indoor plant expertise. Outdoor variables—intense sun, rainfall, humidity swings, pests, fungal pathogens—make remote diagnosis unreliable.

Possible Causes

Sunburn, fungal infections (anthracnose, Cercospora), insect damage, or watering issues could all produce similar symptoms. The spots don't scrape off, ruling out some pests.

Recommended Action

Consult a local horticulturist, master gardener program, or university extension service familiar with Florida conditions. They can examine the plant in context and provide accurate, region-specific treatment.