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Publication #FPS 32

Allamanda violacea Purple Allamanda1

Edward F. Gilman2

Introduction

This evergreen vine or climbing shrub has three-inch-long, funnel-shaped blooms which are reddish-purple fading to pink, giving a two-toned effect (Figure 1). The light green, pubescent leaves are arranged in whorls on weak, sprawling stems. While it can be allowed to rapidly cover an arbor or other support, Purple Allamanda also makes an attractive free-standing specimen shrub with careful pruning. Many people use it to cover the base of a mail box or pole. Allamanda will cascade over a wall and makes a nice hanging basket. Rapid growth creates a sprawling form with individual shoots growing alone, away from the rest of the plant. Regular pinching will keep the plant in bounds, but too much pinching removes flower buds which form on new growth.

Figure 1. 

Purple Allamanda.


[Click thumbnail to enlarge.]

General Information

Scientific name: Allamanda violacea
Pronunciation: al-luh-MAN-duh vye-o-LAY-see-uh
Common name(s): Purple Allamanda
Family: Apocynaceae
Plant type: shrub; ground cover
USDA hardiness zones: 9B through 11 (Fig. 2)
Planting month for zone 9: year round
Planting month for zone 10 and 11: year round
Origin: not native to North America
Uses: container or above-ground planter; ground cover; cascading down a wall; hanging basket
Availability: generally available in many areas within its hardiness range

Figure 2. 

Shaded area represents potential planting range.


[Click thumbnail to enlarge.]

Description

Height: depends upon supporting structure
Spread: depends upon supporting structure
Plant habit: spreading
Plant density: moderate
Growth rate: moderate
Texture: coarse

Foliage

Leaf arrangement: whorled
Leaf type: simple
Leaf margin: entire
Leaf shape: elliptic (oval)
Leaf venation: brachidodrome
Leaf type and persistence: evergreen
Leaf blade length: 4 to 8 inches
Leaf color: green
Fall color: no fall color change
Fall characteristic: not showy

Flower

Flower color: lavender; purple
Flower characteristic: year-round flowering

Fruit

Fruit shape: unknown
Fruit length: unknown
Fruit cover: no fruit
Fruit color: green
Fruit characteristic: inconspicuous and not showy

Trunk and Branches

Trunk/bark/branches: not particularly showy; typically multi-trunked or clumping stems
Current year stem/twig color: green
Current year stem/twig thickness: medium

Culture

Light requirement: plant grows in full sun
Soil tolerances: occasionally wet; acidic; slightly alkaline; clay; sand; loam
Drought tolerance: moderate
Soil salt tolerance: unknown
Plant spacing: 36 to 60 inches

Other

Roots: not applicable
Winter interest: plant has winter interest due to unusual form, nice persistent fruits, showy winter trunk, or winter flowers
Outstanding plant: plant has outstanding ornamental features and could be planted more
Invasive potential: not known to be invasive
Pest resistance: no serious pests are normally seen on the plant

Use and Management

Flowering best in full sun locations, Purple Allamanda should be planted in frost-free sheltered locations in nematode-free soil. Water plants generously until well-established. All parts of the plant are poisonous and should be used with caution in areas frequented by young children.

Propagation is by cuttings but it is grown best when grafted on A. cathartica (Yellow Allamanda) cultivars 'Hendersonii' or 'Schottii.'

Pests and Diseases

No pests or diseases are of major concern except for nematodes. Purple Allamanda is only occasionally bothered by scale and mites.

Footnotes

1.

This document is FPS 32, one of a series of the Environmental Horticulture, UF/IFAS Extension. Original publication date September 1999. Reviewed February 2014. Visit the EDIS website at http://edis.ifas.ufl.edu.

2.

Edward F. Gilman, professor, Environmental Horticulture Department, UF/IFAS Extension, Gainesville, FL 32611.


The Institute of Food and Agricultural Sciences (IFAS) is an Equal Opportunity Institution authorized to provide research, educational information and other services only to individuals and institutions that function with non-discrimination with respect to race, creed, color, religion, age, disability, sex, sexual orientation, marital status, national origin, political opinions or affiliations. For more information on obtaining other UF/IFAS Extension publications, contact your county's UF/IFAS Extension office.

U.S. Department of Agriculture, UF/IFAS Extension Service, University of Florida, IFAS, Florida A & M University Cooperative Extension Program, and Boards of County Commissioners Cooperating. Nick T. Place, dean for UF/IFAS Extension.