Treating Black Spots on Yucca Leaves in Central Florida

A Central Florida gardener has yucca trees with black spots on leaves, leading to leaf removal. They plan to prune in March and want prevention tips.

Cause and Treatment

Black spots are typically fungal, favored by moisture on leaves or contact with diseased material.

• Remove and dispose of all affected leaves/debris (do not compost).
• Apply a fungicide labeled for ornamental plants; follow label directions.
• Improve air circulation; avoid overhead watering.
• Prune in March as planned; sterilize tools between cuts.

Prevention

Keep foliage dry, space plants adequately, and clean up fallen leaves promptly.