Allamanda Cathartica May 2026

Golden Trumpet, Allamanda cathartica - Wisconsin Horticulture

: While naturally a sprawling woody climber that can reach 15–20 feet in length, it can be pruned into a compact shrub or hedge. It lacks tendrils or aerial roots, so it must be physically tied to supports like trellises or fences. Essential Care Guide allamanda cathartica

: Feed every 2–4 weeks during spring and summer with a balanced or high-phosphorus fertilizer to encourage flowers. feature reddish-brown buds.

To thrive, Allamanda cathartica requires conditions that mimic its native tropical habitat: allamanda cathartica

: Produces trumpet-shaped, bright yellow blossoms that can reach up to 5 inches (12.5 cm) in diameter. Some varieties, like 'Hendersonii', feature reddish-brown buds.