Plant Common Name
Hammock Viper's-tail, Wild Allamanda
Wild allamanda's twining stems and glossy yellow-green leaves are a pretty backdrop to the cheerful light yellow flowers from spring to fall. A shrubby evergreen, this frost-tender vine is native to Tropical America, from Florida and the Caribbean islands southward into Latin America. Its foliage is oval, simple (no lobes), glossy and yellowish-green. Sometimes, but rarely, the leaves may be matte with tiny hairs. Anytime sunshine and warmth is plentiful, the light yellow, trumpet-like blossoms appear on the tips of new growth and from side branches on the vine. Hummingbirds and butterflies will visit the blossoms.
Wild allamanda grows well in average to poor, well-drained soils in full to partial sun. Provide ample moisture, especially from spring to late summer, to prevent leaf drop. It is also drought and salt tolerant. Grow it as a small vine upon a trellis or allow it to ramble in a mound in the mixed border or as a groundcover among shrubs and rocks. In cold climates use it as a summer annual in a container on the patio.
The cut stems exude a milky latex that may cause skin irritation. Wild allamanda is also confusingly labeled as "yellow mandevilla" in nurseries across North America.
AHS Heat Zone
12 - 10
USDA Hardiness Zone
10 - 15
H1, H2, 24
8'-10' / 2.4m - 3.0m
Spring, Late Spring, Early Summer, Summer, Late Summer, Early Fall, Fall, Late Fall
Southeastern United States, Latin America and the Caribbean
Acidic, Neutral, Alkaline
Pollution, Drought, Salt
Drought Tolerant, Average Water
Spring, Summer, Fall
Container, Hanging Basket, Mixed Border, Rock Garden / Wall, Tropical, Vine
Sharp or Has Thorns