Form: A climbing vine.
Leaf retention: Evergreen but cold deciduous.
Growth rate: Rapid.
Mature Size: Vines can become 25-50' long.
Flowers: Yellow trumpet flowers 3-4" wide. No fragrance.
Bloom: Spring, possibly summer. Each flower lasts one or two days. In full sun, more flowers bloom
at one time, and the total bloom time may be two weeks. In full shade, the plant may bloom sporadically
throughout spring and summer, most heavily in the spring.
Fruit: A seed pod, often 20" long, green turning to brown, containing oblong, flat, winged seeds.
Leaves: Green leaves occurring in pairs.
Stems: Woody, root-forming at nodes wherever soil is touched. Three pronged, clawed tendrils
located at intervals along the stem assist in vertical climbing. The claws damage surfaces such as stucco
Roots: This plant has underground tubers and above-ground roots called stolons. It is invasive
in moist soil. It becomes highly invasive after hard rains. Grow in a container to prevent invasiveness.
It is one of the most difficult plants to eradicate when grown in the ground.
Wildlife: Attracts bees and birds.
Toxic / Danger: Handling this plant may cause skin irritation.
Origin: Tropical America.
Cultivation and Uses
USDA hardiness zones: 8b-10.
Heat tolerant: Yes.
Drought tolerant: Yes.
Sun: Full sun to full shade. Full sun produces the most flowers at one time.
Water once established: Once or twice a month.
Soil: Adaptable, pH 6.1-7.8 (slightly acidic to slightly alkaline).
Prune: This plant must be headed back if it is growing in an unwanted direction.
Propagation: Seed, cuttings or tubers.
Uses: Ornamental, erosion control and ground cover in desert areas. It can provide shade or
hide a vertical surface such as a fence. It withstands light foot traffic.
This plant is a member of the Trumpet Creeper family (Bignoniaceae). It is benign in dry climates,
but more difficult to control where periodic heavy rains occur. The clawed tendrils can damage surfaces.
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Latest update: July, 2020.