Light. It flowers best in full sun or partial shade. It tolerates deeper shade but blooms less.
Water. Water regularly while it settles in. Once established it is highly drought tolerant, but it does not tolerate flooding.
Soil and feeding. It grows in sand, loam or clay, acidic or alkaline.
Size. Grows 4 ft or more on a trellis. Vines reach 3–12 ft, depending on the support.
Pruning. Prune now and then to control size. Cut the longest stems back inside the plant for fuller growth, or clip regularly to keep it as a low hedge.
Problems to watch. Pests seldom affect its long-term health.
Good to know. A Florida native that handles salty air and salt spray well. Butterflies and hummingbirds visit the flowers. The sap irritates skin and is poisonous if eaten.
Sources: UF/IFAS EDIS FPS-595/FP595: Pentalinon luteum, Wild Allamanda · Florida Native Plant Society Plant Database: Pentalinon luteum
