Allamanda is a genus of flowering plants in the family Apocynaceae. They are native to the Americas, where they are distributed from Mexico to Argentina. Some species are familiar as ornamental plants cultivated for their large, colorful flowers. Most species produce yellow flowers; A. blanchetii bears pink flowers.

They are mostly evergreen trees, shrubs, or vines and contain white latex. The leaves are arranged opposite to one another and the inflorescence is a compound cyme. The flowers have five petals fused and arranged in a bell shape. The name of the genus Allamanda honors the Swiss botanist and doctor Frédéric-Louis Allamand (1736–1809). It is also the official flower of the Kuching North City Hall.

Table of Contents


3 - 6 feet and 10 - 20 feet

Width-Circumference (Avg)

3 - 6 feet

Approximate pH

5.0 - 6.5

Varieties of Allamanda

There are more than a dozen species of allamanda, but the most common one in cultivation is the Allamanda cathartica. This plant is sometimes called the golden trumpet and is a common landscape plant in subtropical and tropical regions. These are a few popular varieties within this species:

  • Allamanda cathartica 'Grandiflora' – certainly grand, with stunning large yellow flowers.

  • Allamanda cathartica ‘hendersoni’ – Golden funnel-flowers up to five inches across.

  • Allamanda cathartica ‘williamsi’ – boasts eye-catching trumpet-like double yellow flowers that bloom year-round but has a poisonous milky sap.

  • Allamanda cathartica 'Flore Pleno' – a lovely showy plant with double white flowers.

The other species are:

  • Allamanda neriifolia – oleander allamanda – Shrubby or half-clinging to about three feet, with large golden flowers.

  • Allamanda blanchetti – also known as purple Allamanda. A native to Brazil cultivated as an ornamental plant.

  • Allamanda schottii ‘Compacta’ – A Dwarf allamanda cultivar selected to withstand the tough summers of Florida and look great throughout.

  • Allamanda violacea – Slender climber with reddish-purple flowers, usually grafted onto cathartica stock.

Planting Allamanda

How to plant allamanda

The planting of an allamanda is an important step, even though it cannot be planted outdoors everywhere. Planting in a pot is an option in some cases.

Allamanda directly in the ground

Allamanda can survive outdoors year-round only in mild-wintered areas. It cannot withstand temperatures below freezing.

If you live around the Mediterranean, plant it in spring in light soil.

  • It needs a lot of sun to develop well.

  • It loves soil that drains particularly well. It’ll thus feel right at home with a mix of one part garden soil, one part soil mix and one part sand.

  • Allamanda must be planted in a warm spot and should be brought indoors in winter if temperatures drop below 40°F (5°C).

  • Choose a place that is sheltered from wind and preferably along a lattice that it can climb along.

Indeed, wind tends to dry plants out, and Allamanda is vulnerable to air that is too dry.

Additionally, as a precaution against transplant shock, cover it with a shade veil for 2-3 weeks just after planting, if the weather is very hot. Later on, this isn’t necessary.

Planting allamanda in pots

Growing allamanda in pots is recommended everywhere temperatures drop below 40°F (5°C) during winter.

You’ll be able to bring your allamanda in a well-lit place where it doesn’t freeze over winter.


Allamanda takes pruning well, it even helps it grow stronger.

Indeed, this is a vigorous climbing vine we’re dealing with, sometimes even invasive. Pruning it is the way to set boundaries to its growth.

  • Pruning doesn’t impact the blooming, nor does it slow the allamanda’s growth.

  • Severe pruning can also be performed several times a year, or once every couple years.

  • Pruning before spring growth renews is best, at the end of winter.

Allamanda Care for Indoors

Allamanda is not a very forgiving plant in the home environment. Plants that are exposed to cold drafts or denied adequate water tend to drop leaves with impunity. Also, they will not bloom unless there's adequate warmth. For these reasons, many people in colder latitudes reserve Allamanda for the greenhouse or conservatory.

The most dangerous period for Allamanda cultivation is winter when even warm houses tend to become exceedingly dry. In these cases, it's essential to mist your plant frequently to help it keep its leaves—dropping leaves is not a good sign or a sign of natural growth cycles.


Allamanda prefers strong light, including some direct sun. They can be adapted to full sun, or they can be grown successfully in an east-facing window with only a few hours of the morning sun. Adequate sunlight is essential for blooming.


A rich, peat-based potting soil with excellent drainage is beneficial.


Water liberally throughout the summer, making sure your growing pot has good drainage. It's also helpful to mist every other day or so to provide adequate humidity. In the winter months, reduce watering, but don't let the plant dry out and make an effort to keep the root ball warm.


Feed with a weak liquid fertilizer throughout the growing season. Cut fertilizer back to once a month or so in the winter.

Propagating Allamanda

Allamanda roots readily from stem tip cuttings. To have the best chance of success, take the cutting early in the growing season from a fresh green shoot. Use a rooting hormone for the best chances of success and pot the cutting into a fresh pot of seed-starting soil. Place the cutting in a warm, humid environment with bottom heating and wait for new growth to emerge before potting out into a larger container.


Repot Allamanda in the spring when new growth emerges—this is also a good time to take cuttings. When you repot, place it into a larger pot and provide some support if necessary. Allamanda can be grown as a low shrub, but it does best if allowed to grow up a simple support and trail slightly. This seems to show off its blooms to maximum effect.

Pests and Problems

Wilting Leaves and Dropping Shoots – This is a sign of lack of water. Make sure the plant is receiving enough water, especially during warm, dry times of the year.

If the plant is potted and “drys out”, set the pot in a bucket of water to allow the soil to “soak up” the media thoroughly.

Plumeria Caterpillars – Pseudosphinx tetrio species, with common names frangipani hornworm, rasta caterpillar, feeds and pupates on the leaves of Apocynaceae plants including those of Allamanda shrubs. As they reproduce fast, an infestation can quickly result to defoliation.

Apart from infesting oleander shrubs, some gardeners experience oleander caterpillars infestation in their Allamanda plants.

Spider Mites – More common when growing Allamanda on a sun porch or greenhouse. Pale looking foliage and cobwebs on the underside of leaves. Leaves begin to drop. Try treating with a miticide.

Brownish Spots / Stunted Growth – Look for aphids on tender growth. Use a natural insecticide, neem oil for plants or other controls for aphids.

Benefits of Allamanda

Allamanda flowers besides beautiful also have other benefits. We can use the roots, leaves and flowers as ingredients for medicine.

  1. Allmanda leaves can be used as an external medicine for diseases abscesses, eczema, ulcers and ringworm.

  2. The taste on Allamanda leaves is spicy, bitter, warm and poisonous, so efficacious for laxatives and causes of vomiting.

  3. Batang Allamanda very hard and gummy, but the sap can be used to cure dysentery disease.

  4. Flower allamanda efficacious to prevent complications from malaria and swelling of the spleen.

  5. Allamanda root efficacious to prevent jaundice.

  6. Allamanda leaves efficacious for antidote poisoning.


  • It is used as Ornamental plant.

  • It is used as medicinal - Jaundice, Liver problems and Malaria.

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