shrub

Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark

Hakea divaricata

The Story

Plant Bio

Hakea divaricata, commonly known as needlewood, is a slow-growing woody species native to the arid interior of Australia, where it develops as an upright shrub or gnarled small tree. The trunk is defined by a thick, deeply furrowed, dark corky bark that provides insulation against wild fires, while the younger branchlets show a smooth red colour.

This species is distinguished by its rigid, alternate leaves that fork repeatedly into extremely sharp, needle-like segments up to twenty centimetres long. From winter through spring, it produces long axillary racemes containing up to one hundred and twenty cream to greenish-yellow flowers rich in nectar.

Uses & Benefits:

Features a highly textured, deeply furrowed corky trunk and architectural, needle-like foliage.

Functions as an effective physical barrier or security screen due to its rigid, sharp-pointed leaves.

Provides a vital source of winter and spring nectar for native bees, insects, and nectar-feeding birds.

Essentials

At a Glance

Plant Type

Shrub

Height

276 inches

Width

157 inches

Light

Full Sun

Zones

9, 10

Water

Low

Humidity

Low

Lifespan

Long-lived

Native To

Central Australia

Toxicity

Non-toxic

Bloom period

Winter – Spring

In flower about 4 months of the year

Planting

How to Grow

Select a planting site in full sun with exceptionally sharp-draining sandy soil or an elevated mound to prevent waterlogging.
Dig a hole twice the width of the root ball but of equal depth, ensuring the plant sits at its original soil level.
Backfill with native soil without adding organic compost or general-purpose fertilisers containing phosphorus.
Water deeply immediately after planting to settle the soil, then restrict watering to dry periods until established.

Pro Tip

Plant in coarse, sandy soil with absolute drainage, as any water retention around the root zone triggers fatal Phytophthora root rot. Avoid pruning back into old, leafless wood, which lacks active epicormic buds and will fail to regenerate.

Keep It Thriving

Care Guide

Do

Ensure the soil drains completely and rapidly to protect the root system from rot.
Use only low-phosphorus fertilisers formulated specifically for Australian native plants.
Position the plant away from high-traffic pathways where the sharp foliage could cause injury.

Don't

Do not plant in heavy clay soils or low-lying areas prone to standing water.
Do not prune heavily into old, bare wood as the plant may fail to shoot back.
Do not apply standard garden fertilisers containing high levels of phosphorus.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Specimen plantingSecurity barrierArid garden focal pointWildlife habitat

Companion Plants

Triodia scariosa Acacia aneura Eucalyptus gamophylla

Multiply

Propagation Methods

Good to Know

Common Questions

Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark questions

What zones can Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark grow in?

Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark 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 Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark bloom?

Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark typically blooms in winter through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark need full sun?

Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark does best in full sun (6+ hours).

Is Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark drought tolerant?

Yes — once established (usually after the first full season), Needlewood, Corkbark tree, Fork-leaved corkwood, Corkbark handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.