Species

Acacia cognataBower Wattle

2 other cultivars

shrub

Limelight Wattle

Acacia cognata 'Limelight'

The Story

Plant Bio

Acacia cognata, the river wattle, is an evergreen Australian shrub or small tree native to the moist forest margins of New South Wales and Victoria. It is characterized by narrow, pendulous foliage and small, pale yellow globular flower heads that appear in spring.

'Limelight' is a dwarf cultivar that forms a dense, rounded mound of weeping, bright chartreuse foliage. It reaches a mature height of thirty-six inches and is primarily grown for its soft, cascading texture rather than its sparse spring blooms.

Uses & Benefits:

Provides a soft, cascading texture and bright chartreuse color year-round in borders or containers.

Acts as an effective low-maintenance groundcover or border edge in dry, Mediterranean climates.

Offers dense cover and nesting sites for small birds and beneficial insects.

SpeciesAcacia cognataBower Wattle

Essentials

At a Glance

Plant Type

Shrub

Height

36"

Width

48"

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Low to Moderate

Humidity

Low to Moderate

Lifespan

Moderate

Native To

Australia

Toxicity

Non-toxic

Bloom period

Spring

In flower about 3 months of the year

Planting

How to Grow

Select a planting site with full sun to partial shade and excellent soil drainage.
Dig a hole twice as wide as the root ball but no deeper, ensuring the crown sits slightly above the surrounding soil level.
Backfill with native soil without adding organic compost or fertilizer, which can trap moisture and damage roots.
Water deeply to settle the soil, then establish a strict watering schedule that allows the top few inches to dry completely between applications.

Pro Tip

Plant in highly permeable, sandy or loamy soil on a slope or raised bed; waterlogged roots cause rapid decline and death from Phytophthora.

Keep It Thriving

Care Guide

Do

Do plant in raised beds or mounds if your native soil is heavy clay.
Do use a low-phosphorus fertilizer formulated specifically for native Australian plants.
Do prune lightly immediately after spring flowering to maintain a compact shape.

Don't

Don't prune hard into old, leafless wood, as the plant cannot regenerate from bare branches.
Don't allow the soil to remain waterlogged or sit in a saucer of water.
Don't use standard high-phosphorus garden fertilizers.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Mulch
Pest Check
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Container specimenBorder edgingMass plantingRock garden

Companion Plants

Lomandra longifolia Westringia fruticosa Grevillea

Multiply

Propagation Methods

Good to Know

Common Questions

Limelight Wattle questions

What zones can Limelight Wattle grow in?

Limelight Wattle is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Limelight Wattle bloom?

Limelight Wattle typically blooms in spring through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Limelight Wattle need full sun?

Limelight Wattle does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Limelight Wattle drought tolerant?

Yes — once established (usually after the first full season), Limelight Wattle handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.