Native to Tropical America, Allamanda williamsii or golden trumpet vine is a beautiful ever-blooming vine, which produces bright yellow or orange double trumpet-like flowers. Its flower is fragrant and blooms all year round. This plant has a milky white sap, which can be irritating, and should be handled with caution when pruning.
Golden trumpet vine can be grown in a variety of soil types, in USDA zones 9 to 11. The plant grows best in semi-shaded conditions and needs to be watered regularly. If it is planted in a cold region and grown in pots, it needs to protected from frost and cold winds and should be taken indoors during the winter. It should not be fertilized during the winter months but can be cut back if necessary.
The vine typically withstands heat and humidity and also adapts to varied soil conditions. It can also be grown in containers. When planting in a container, it may require additional pruning and frequent watering to maintain its height and keep the soil moist.
Overall, the golden trumpet vine grows well in most places, provided it is given the right amount of care. Its bright and cheerful flowers make it an ideal choice for brightening up a garden and adding color.