Plumeria trees are native to the tropics and require protection when temperatures fall into the 40s or below. Plumeria thrives in full sun or light shade and needs well-drained soil.
Plumeria trees need at least 1 inch of water per week and should be fertilized with a high-phosphorus fertilizer twice per month during the growing season. The trees perform well in containers, and gardeners who grow them in regions experiencing seasonal cold temperatures winter them indoors. Periodically inspecting plumeria for signs of insect pests, such as mealybugs, whiteflies and spider mites, is recommended. Topically applying insecticidal soap or horticultural oil keeps insect populations down. Although pruning isn't necessary for flower production, lightly pruning plumeria trees during spring ensures an attractive shape. Plumeria trees should be planted during spring and spaced 10 to 20 feet apart.