The Story
Plant Bio
Hakea petiolaris, the sea-urchin hakea, is an upright, evergreen shrub or small tree native to Western Australia, characterized by its distinctive pale grey-green to blue-green, leathery leaves held on long petioles. In fall and winter, it produces spherical flower clusters along the woody stems that open cream-colored and age to deep pink or purple, with long, protruding styles resembling sea urchins.
The species is highly adapted to dry, Mediterranean climates and develops a woody lignotuber at the base, allowing it to regenerate after environmental stress. New growth emerges on decorative reddish stems, contrasting with the mature blue-grey foliage.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Shrub
Height
216"
Width
120"
Light
Full Sun
Zones
9, 10
Water
Low
Humidity
Low
Lifespan
Long-lived
Native To
Western Australia
Toxicity
Non-toxic
Bloom period
Fall – Spring
In flower about 9 months of the year
Planting
How to Grow
- Select a planting site in full sun with exceptionally well-drained, sandy or loamy soil.
- Dig a hole twice as wide as the root ball but no deeper, ensuring the crown sits slightly above the surrounding soil level.
- Water deeply immediately after planting to settle the soil, then restrict watering to dry spells during the first summer.
- Apply a thick layer of coarse, low-nutrient mulch around the base, keeping it clear of the main stem to prevent rot.
Pro Tip
Avoid any fertilizer containing phosphorus, as this plant is highly sensitive and standard garden feeds will quickly prove fatal.
Keep It Thriving
Care Guide
Do
- Grow in exceptionally well-drained soil.
- Provide full sun to maximize flowering and maintain a compact habit.
- Tip-prune young plants to encourage branching.
Don't
- Do not apply standard fertilizers containing phosphorus.
- Do not allow the roots to sit in wet, boggy soil.
- Do not prune heavily into old, leafless wood.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Pest Check | ||||||||||||
| Propagate | ||||||||||||
| Prune | ||||||||||||
| Winter Prep |
Watch Out For
Pests & Diseases
Common Pests
Common Diseases
In the Garden
Landscape Uses & Companions
Landscape Uses
Companion Plants
Multiply
Propagation Methods
Good to Know
Common Questions
Sea-urchin Hakea questions
What zones can Sea-urchin Hakea grow in?
Sea-urchin Hakea 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 Sea-urchin Hakea bloom?
Sea-urchin Hakea typically blooms in fall through spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Sea-urchin Hakea need full sun?
Sea-urchin Hakea does best in full sun (6+ hours).
Is Sea-urchin Hakea drought tolerant?
Yes — once established (usually after the first full season), Sea-urchin Hakea handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Hakea to compare
Grass-Leaf Hakea
Hakea francisiana
Burrendong Beauty
Hakea x hybrida 'Burrendong Beauty'
Pincushion Hakea
Hakea laurina
Red Pokers
Hakea bucculenta
Needlewood
Hakea divaricata
Baker's Hakea
Hakea bakeriana
Keep exploring
Explore the genus
Hardy in your zone?
Grow Sea-urchin Hakea with confidence
See it in a design of your actual yard, get zone-matched care reminders, and track it season by season in your garden journal.