Bougainvillea Cream Spots and Leaf Drop: Magnesium or Water

10-year bougainvilleas suddenly develop cream irregular spots on leaves, then drop. Leaves cream-colored on ground.

Possibilities

• Overwatering/poor drainage (rain?): Bougainvillea needs excellent drainage.
• Magnesium deficiency: Older leaves show spotted yellow/tan.

Action

• Check drainage; reduce watering if wet.
• Apply Epsom salt (magnesium sulfate) if deficiency suspected.
• Ensure full sun.