Species

Callistemon citrinusCrimson Bottlebrush

4 other cultivars

shrub

Endeavour Bottlebrush

Callistemon citrinus 'Endeavour'

The Story

Plant Bio

Callistemon citrinus is an evergreen Australian shrub native to swamp margins and wet heathlands, with narrow leathery leaves that smell of lemon when crushed. The flowers have no petals to speak of; the display comes from dense cylindrical spikes of bright red stamens held at the shoot tips, produced in flushes through the season.

'Endeavour' is a dense, compact cultivar that grows as an upright bushy shrub reaching two to three metres in garden cultivation. It is distinguished by its brilliant crimson-red flower spikes with dark anthers and new growth that is often suffused with coppery-pink tones.

Uses & Benefits:

Showy crimson-red flower spikes and coppery-pink new growth provide strong visual interest.

Functions as a dense windbreak or hedge, tolerating both coastal salt spray and waterlogged soils.

Provides nectar for honeyeaters, lorikeets, native bees, and butterflies.

SpeciesCallistemon citrinusCrimson Bottlebrush

Essentials

At a Glance

Plant Type

Shrub

Height

118 inches

Width

118 inches

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Low to medium

Humidity

High

Native To

Australia (cultivar of Australian native species)

Toxicity

Non-toxic

Bloom period

Spring – Autumn

In flower about 7 months of the year

Planting

How to Grow

Plant in a position that receives full sun to partial shade, ensuring the soil is cleared of competing weeds.
Dig a hole twice the width of the root ball and of equal depth, placing the plant so the soil level matches the container level.
Water thoroughly upon planting and maintain consistent moisture during the first summer to establish the root system.
Apply a light layer of organic mulch around the base, keeping it clear of the main stem to prevent rot.

Pro Tip

Prune just behind each spent brush; cutting further back into old bare wood gives slow, patchy regrowth.

Keep It Thriving

Care Guide

Do

Prune immediately after the main flowering period to maintain a dense, bushy habit.
Water regularly during dry spells while the plant is young and establishing.
Use a low-phosphorus native or balanced slow-release fertiliser sparingly if soil nutrition is poor.

Don't

Do not prune heavily into old, leafless wood where epicormic buds may fail to reliably resprout.
Do not allow young plants to dry out completely before their root systems are fully established.
Do not over-fertilise, as Callistemons require only minimal nutrients to thrive.

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

HedgesCoastal gardensBog gardensWindbreaks

Multiply

Propagation Methods

Good to Know

Common Questions

Endeavour Bottlebrush questions

What zones can Endeavour Bottlebrush grow in?

Endeavour 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.

When does Endeavour Bottlebrush bloom?

Endeavour Bottlebrush typically blooms in spring through autumn. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Endeavour Bottlebrush need full sun?

Endeavour Bottlebrush does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Endeavour Bottlebrush drought tolerant?

Yes — once established (usually after the first full season), Endeavour Bottlebrush handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.