Light. Plant it in full sun, with 6 or more hours of direct sun a day.
Water. It needs ample moisture, especially while it establishes. The soil must still drain well.
Soil and feeding. It grows best in loamy soil high in organic matter, with an acid to neutral pH.
Size. A compact form of yellow allamanda that grows to about 2–3 ft, good for a low hedge.
Problems to watch. Spider mites and whiteflies may attack. Spray with Insecticidal Soap following the label.
Good to know. It needs a frost-free spot and suits butterfly gardens. All parts are poisonous if eaten, including to dogs and cats. The milky sap irritates skin and eyes, so wear gloves when trimming.
Sources: NC State Extension Plant Toolbox: Allamanda cathartica · Royal Horticultural Society: Allamanda cathartica · UF/IFAS Fact Sheet FPS-31: Allamanda neriifolia, Bush Allamanda (archived copy)
