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Golden Trumpet
Scientific Name: Allamanda cathartica L.
Synonym:
Family: Apocynaceae
Golden Trumpet (Allamanda  cathartica)
Picture taken at Tropica Mango Nurseries
Recommended Temperature Zone:
sunset: 24-27
USDA: 10-12

Frost Tolerance: Prefers frost free areas, treat as a bougainvillea. Foliage hardy to to 30°F ( -1°C), but will weaken and probably die if kept too cold for a long period of time

Minimum Avg. Temperature: 60°F (15°C)

Heat Tolerance: Not adapted to the low desert climates

Sun Exposure: Light shade

Origin: Brazil

Growth Habits: Evergreen shrub to vine (var. hendersoni), up to 15 feet tall (4.5 m)

Watering Needs: Prefers regular to generous watering during hot conditions. Moderate drought tolerance. Requires a relatively humid air.

Propagation: Cuttings in late spring.


Allamandas are used throughout the tropics as ornamentals. They are easy to grow, in warm conditions. You can plant anytime if you water abundantly. Feed liberally with a balanced fertilizer. All parts of the plant are toxic, and the milky sap can irritate the skin.
The genus name is coming from the 18th century Swiss doctor, Frédéric-Louis Allamand.

Allamanda neriifolia has similar leaves and has flowers with a reddish throat. It is a shrub.

  • Jamaican Sunset: light pink to light purple, probably an hybrid
  • Stansill's Double, Flore Pleno: with double flowers, 10 petals

Cultural Practices:
Feed heavily during the growing season. Prune in spring.

Blooming Habits:
Up to 6 inches in diameter (15 cm), trumpet shaped, single or double, yellow flowers in summer.

Fruiting Habits:

References:
Botanica : The Illustrated A-Z of over 10,000 Garden Plants


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Desert-Tropicals is dedicated to provide gardening advice, gardening ideas, and information about flower of all kind for landscape and collections. We try to check carefully the identification of the plants on the illustrations as well as the other information from the page, but occasionally errors do occur. if you notice anything that needs to be changed please contact us. Thanks.

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