Gardening
in Tucson, Phoenix,
Arizona and California

Gardening in Tucson, Phoenix, Arizona and California

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Hardenbergia violacea: Coral-pea / Lilac Vine

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Description
Form: Vine.
Lifespan: Perennial.
Leaf retention: Evergreen but cold-deciduous.
Growth rate: Moderate.
Mature Size: Climbs 12-16' high and 10' wide.
Flowers: Purple, pink or white, 3/8" wide, pea-family shape, in elongated clusters, lacking fragrance.
Bloom: Winter to early spring.
Fruit: Seed pod.
Leaves: Green, thick, lance-shaped, 2-4" long. Used long ago for making tea.
Stems: No thorns. Woody, twining.
Roots: Nitrogen-fixing*. Shallow.
Wildlife: Attracts bees and birds.
Toxic / Danger: No.
Origin: Australia.

Cultivation and Uses
USDA hardiness zones: 9-11. Damaged by temperatures under 20°F.
Heat tolerant: No.
Drought tolerant: Yes.
Sun: Needs part shade or open shade all day, especially western shade, such as on the north side of a house or under a covered patio, to survive the hottest months of year in the desert southwest.
Water once established: Once or twice a month. May require more water in hottest months of year.
Soil: pH 5.6-7.5 (acidic to neutral). *Do not use a nitrogen fertilizer.
Prune: After flowering to make growth more compact.
Litter: Low.
Propagation: Seed.
Uses: Ornamental.

Comments
Local nurseries in the desert southwest often do not carry this plant because it tends to die of heat stress in full sun.



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Hardenbergia violacea: Coral-pea / Lilac Vine - flowers

Hardenbergia violacea: Coral-pea / Lilac Vine