Allamanda Bush (Allamanda cathartica), commonly known as Golden Trumpet or Yellow Allamanda, is a vibrant, tropical shrub admired for its large, showy, trumpet-shaped flowers and its lush, dark green foliage. Native to South America, this evergreen plant is a popular choice in tropical and subtropical gardens for its bold, striking blooms and rapid growth. Known for its ability to thrive in warm climates, the Allamanda Bush is perfect for adding a tropical touch and continuous color to landscapes.

Typically growing 4 to 6 feet tall and wide, with some varieties reaching up to 10 feet, the Allamanda Bush has a dense, upright growth habit with thick, leathery, oval leaves that provide a rich green backdrop for its flowers. The plant is most famous for its vibrant, golden-yellow blooms, which can be 3–4 inches in diameter and are shaped like a trumpet. These flowers are borne in clusters at the tips of the branches, creating an eye-catching display from spring to fall and often blooming year-round in tropical climates.

The flowers of the Allamanda Bush are not only visually striking but also highly fragrant, attracting pollinators like butterflies, bees, and hummingbirds. The bright yellow color and large size make the flowers stand out, creating a stunning focal point in the garden. As the flowers mature, they sometimes develop a slightly orange tint at their edges, adding even more variety to the display.

Allamanda prefers full sun to partial shade and thrives in well-draining, fertile soil. It is heat-tolerant and somewhat drought-tolerant once established, making it suitable for water-wise and low-maintenance gardens. The bush benefits from regular watering, especially during dry periods, to maintain its lush foliage and prolific blooming. In USDA Hardiness Zones 9–11, Allamanda is grown as a perennial, though it can be grown in containers and overwintered indoors in cooler regions.

In terms of care, the Allamanda Bush is relatively low-maintenance. Pruning can be done after flowering to maintain its shape and encourage further blooms. Fertilizing with a balanced fertilizer during the growing season can help promote healthy growth and a continued show of flowers. While it is generally hardy, Allamanda can be prone to pests such as aphids, mealybugs, or spider mites, but these can typically be managed with natural or chemical treatments.

Allamanda also makes an excellent choice for a hedge, border, or screen, providing both privacy and aesthetic value. When grown on a trellis or support, it can be trained to climb and cover fences or walls with its vibrant flowers. It is an ideal plant for creating tropical-themed gardens or as a focal point in a mixed border.

Overall, the Allamanda Bush is a bold and beautiful shrub that offers a stunning display of yellow trumpet-shaped flowers, making it a standout in any tropical or subtropical garden. Its ease of care, rapid growth, and vibrant blooms ensure that it remains a favorite among gardeners seeking both beauty and impact.