
Slim Bottlebrush
Callistemon viminalis 'Slim'
Essentials
At a Glance
Plant Type
Shrub
Height
108 inches
Width
54 inches
Light
Full Sun
Zones
8, 9
Water
Low to Medium
Humidity
Low to High
Lifespan
Long-lived evergreen shrub
Native To
Australia (cultivar)
Toxicity
Non-toxic
The Story
Plant Bio
Callistemon viminalis, or Weeping Bottlebrush, is an evergreen shrub or small tree from Australia, famous for its brilliant red, brush-like flower spikes. It has a graceful, often weeping habit. 'Slim' is a unique, narrow, columnar cultivar perfect for tight spaces. It is a heavy bloomer, producing masses of classic red bottlebrush flowers from spring through fall and requires little pruning.
Bloom Period:
Uses & Benefits:
Marketplace
Where to Buy
Shipping costs Year-round shipping Free shipping
Planting
How to Grow
- Plant in a location that receives at least 6 hours of direct sun daily.
- Ensure the soil is well-drained; amend with grit if necessary.
- Dig a hole twice the width of the pot.
- Set the plant in the hole, ensuring the root flare is at soil level.
- Backfill with soil and water deeply to settle.
- Water regularly for the first year; it is drought tolerant once established.
Pro Tip
Use a low-phosphorus fertilizer; like many Australian plants, Callistemon can be sensitive to high levels of phosphorus.
Keep It Thriving
Care Guide
Do
- Provide full sun for maximum flowering.
- Water deeply but infrequently once established.
- Mulch to conserve moisture and suppress weeds.
- Deadhead spent flowers to encourage reblooming, though not always necessary.
Don't
- Do not plant in shade; it will become leggy and flower poorly.
- Avoid planting in poorly drained, constantly wet soils.
- Do not use high-phosphorus fertilizers.
- Avoid heavy pruning into old, bare wood.
Seasonal Care Calendar
| Task | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fertilize | ||||||||||||
| Pest Check | ||||||||||||
| 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
Slim Bottlebrush questions
What zones can Slim Bottlebrush grow in?
Slim Bottlebrush 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 Slim Bottlebrush deer resistant?
Yes — Slim Bottlebrush is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.
When does Slim Bottlebrush bloom?
Slim Bottlebrush typically blooms in late spring through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.
Does Slim Bottlebrush need full sun?
Slim Bottlebrush does best in full sun (6+ hours).
Is Slim Bottlebrush drought tolerant?
Yes — once established (usually after the first full season), Slim Bottlebrush handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.
More Callistemon to compare

Cane's Hybrid Bottlebrush
Callistemon citrinus 'Cane's Hybrid'

Little John Dwarf Bottlebrush
Callistemon citrinus 'Little John'

Weeping Bottlebrush
Callistemon viminalis 'Red Cluster'

Violet Bottlebrush
Callistemon violaceus

Weeping Bottlebrush
Callistemon viminalis

Woodlander's Hardy Bottlebrush
Callistemon 'Woodlander'S Hardy'
