One-sided Bottlebrush
Calothamnus quadrifidus
Not currently listed at our partner nurseries.
Essentials
At a Glance
Plant Type
Shrub
Height
96 inches
Width
96 inches
Light
Full Sun, Partial Sun
Zones
9
Water
Low
Humidity
Low
Lifespan
Evergreen shrub
Native To
Western Australia
Toxicity
Non-toxic
The Story
Plant Bio
Calothamnus quadrifidus, commonly known as the One-sided Bottlebrush, is a shrub known for its distinctive red flowers and drought tolerance. Notable for its unique flower structure and ability to thrive in sandy soils.
Uses & Benefits:
Marketplace
Where to Buy
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Planting
How to Grow
- Tuck seeds into well-draining soil in early spring for best germination.
- Mist cuttings regularly to maintain humidity and promote rooting.
- Transplant young plants after the last frost, approximately 6 weeks.
- Prune lightly after flowering to shape and encourage bushiness.
- Fertilize with a low-phosphorus native plant fertilizer in spring and summer.
- Mulch around the base to retain moisture and suppress weeds.
Pro Tip
Use well-draining sandy soil and full sun for optimal growth.
Keep It Thriving
Care Guide
Do
- Water deeply during dry periods 🌱
- Prune after flowering to maintain shape
- Apply native plant fertilizer in spring
Don't
- Overwater, which can cause root rot ❌
- Use high-phosphorus fertilizers
- Allow soil to become waterlogged
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| 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
One-sided Bottlebrush questions
What zones can One-sided Bottlebrush grow in?
One-sided Bottlebrush 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.
Is One-sided Bottlebrush deer resistant?
Not reliably. Deer may browse One-sided Bottlebrush, especially tender spring growth — plan on repellents or fencing where pressure is high.
When does One-sided Bottlebrush bloom?
One-sided Bottlebrush typically blooms in winter to summer through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does One-sided Bottlebrush need full sun?
One-sided Bottlebrush does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.
Is One-sided Bottlebrush drought tolerant?
Yes — once established (usually after the first full season), One-sided Bottlebrush handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
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Grow One-sided Bottlebrush 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.
