The golden trumpet plant is a perennial vine of the Apocynaceae family. It is native to Brazil and is very frost tender, but can be grown in the United States in warmer climates. During the winter (in cooler climates), the golden trumpet should be brought into the house and grown as a houseplant, though it is difficult to grow as a houseplant because of its large size.
The golden trumpet plant produces yellow flowers. The trumpet-shaped flowers could be single or double flowers--both types have white markings in their throats. The leaves are leathery and obovate. They are typically light green in color and grow up to 6 inches long. The leaves grow in pairs or in whorls of three or four along the stem. The stems produce a milky sap.
The golden trumpet plant is a tropical, evergreen vine. It thrives in USDA hardiness zones 10 to 11 and prefers rich, well-drained soil. The ideal weather should be hot and humid, with minimum night temperatures of 60 degrees Fahrenheit or above. The plant could also be grown as an annual in areas with hot, humid summers and cold winters.
The golden trumpet is a vine that requires a trellis or a fence to support it. It does not twine, nor does it have tendrils or aerial roots. This vine could also be pruned so that it grows as a shrub. If not pruned, it could rapidly grow to a height of 20 feet.
Water the golden trumpet plant at least once per week with an inch of water. This plant requires moist, but not waterlogged, soil. The soil should be well-drained and kept moist at all times.
Pests and Diseases
Though the golden trumpet is usually free from pests and disease, it should be checked periodically for mealy bugs, scales and leaf spot. If you notice scales are mealy bugs, treat them with the proper insecticide, available from your local nursery. For leaf spot, treat with the proper fungicide, also available from your local nursery.