The Story
Plant Bio
Cassinia aculeata is an upright, dense-crowned evergreen shrub native to southeastern Australia, characterized by its stiff, twiggy habit and narrow, dark green leaves with silvery undersides. The foliage has a rough, scabrous texture and can cause contact dermatitis upon handling.
During summer and fall, the branch tips bear dense, flat-topped clusters of creamy-white to dusty pink buds that open into small, whitish composite flower heads. This species serves as an adaptable pioneer plant, establishing quickly in well-drained soils.
Uses & Benefits:
Essentials
At a Glance
Plant Type
Shrub
Height
120"
Width
60"
Light
Full Sun, Partial Sun
Zones
8, 9, 10
Water
Low to Moderate
Humidity
Moderate
Lifespan
Short to Moderate
Native To
Southeastern Australia
Toxicity
Skin Irritant
Bloom period
Summer – Fall
In flower about 6 months of the year
Planting
How to Grow
- Select a planting site in full sun to partial shade with excellent drainage.
- Amend heavy soils with sand or grit to prevent waterlogging around the root zone.
- Water regularly during the first growing season to establish a deep root system.
- Apply a low-phosphorus native plant fertilizer sparingly in early spring.
Pro Tip
Prune lightly immediately after flowering to maintain a dense, bushy habit; cutting back hard into old, leafless wood prevents the plant from shooting back.
Keep It Thriving
Care Guide
Do
- Prune lightly after the flowering season to maintain shape.
- Ensure the soil drains rapidly to prevent root rot.
- Wear gloves when handling the foliage to avoid skin irritation.
Don't
- Do not prune hard into old, leafless woody stems.
- Do not allow the roots to sit in waterlogged or poorly drained soil.
- Do not over-fertilize with high-phosphorus formulas.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| Propagate | ||||||||||||
| Prune |
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
Common Cassinia questions
What zones can Common Cassinia grow in?
Common Cassinia is hardy in USDA Zones 8–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.
Is Common Cassinia deer resistant?
Not reliably. Deer may browse Common Cassinia, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does Common Cassinia bloom?
Common Cassinia typically blooms in summer through fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Common Cassinia need full sun?
Common Cassinia does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is Common Cassinia drought tolerant?
Yes — once established (usually after the first full season), Common Cassinia handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Cassinia to compare
Keep exploring
Explore the genus
Hardy in your zone?
Grow Common Cassinia 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.