Plumeria Winter Behavior: Dormancy, Fungus, and Leaf Drop

Normal Seasonal Cycle

In zones 10 and below, plumeria (frangipani) goes semi-dormant in winter: leaves yellow and drop, leaving bare stems. This is natural, not a sign of death.

Yellow Powdery Substance

The "yellowy gold powder" is likely a benign fungus (e.g., powdery mildew) common during cool, humid periods. It won't kill the plant but accelerates leaf drop.

Winter Care

• Keep potted plumerias dry; water once a month at most.
• Store in a cool (50–60°F), bright location.
• Do not fertilize until spring growth resumes.

Spring Revival

When nights stay above 55°F, move outdoors, resume watering, and fertilize with high-phosphorus formula. New leaves and flowers will appear.

Planting in ground is only advisable in frost-free zones (10b+).