Back to Plant Library

Lilac Vine

Hardenbergia violacea

Lilac Vine
Vines

An Australian evergreen vine that covers itself in clusters of small violet pea flowers in late winter, when little else in the garden is blooming. It twines neatly up a trellis and does best in Phoenix with some protection from hot afternoon sun.

Medium
Full sunpreferred
Ask a designer about it
Mature sizeUp to about 20′ long with support
Growth rateModerate
Water useModerate; tolerates some dryness once established
SunWinter sun with afternoon shade in summer
BloomViolet-purple clusters, late February into spring
Cold hardinessDamaged below about 24°F
FoliageLeathery, lance-shaped green leaves, 2–4″ long
HabitTwining; needs a trellis, wire or fence to climb

Living with it in the Phoenix Valley

Watering

Follow the shrub schedule in our Landscape Care guide. It needs well-drained soil and does not tolerate soggy roots, so let the soil dry slightly between waterings.

Pruning

It needs little pruning. If it outgrows its space, cut it back after the bloom finishes in spring; even a hard cut is tolerated.

Heat

Summer is its hard season. Keep it away from west walls and reflected heat off concrete, where leaves scorch.

Feeding

In alkaline soils it can show yellowing leaves. A light spring feeding with an organic fertilizer helps keep the foliage deep green.

How our designers use it

East and north walls

It thrives on a trellis where it gets winter sun and afternoon shade in summer.

Late-winter color

Its bloom fills the gap between winter annuals and the spring flush of desert shrubs.

Light screening

Its fine twining stems cover a fence or wire panel without the bulk of larger vines.

Good to know

Around the pool

Litter is light and it has no thorns. Its flowers draw bees in late winter, so we keep it a few feet back from seating and the pool edge.

Pairs well with

Similar plants

← Back to the Plant Library

Picturing one in your yard?

Our designers can show you where it will thrive, what to plant beneath it and how it fits the rest of your landscape.

Begin the Conversation