Callistemon Species, Albany Bottlebrush, Gray Bottlebrush, Swamp Bottlebrush

Callistemon speciosus

Family: Myrtaceae (mir-TAY-see-ee) (Info)
Genus: Callistemon (kal-lis-STEE-mon) (Info)
Species: speciosus (spee-see-OH-sus) (Info)
Synonym:Callistemon glaucus
Synonym:Callistemon heleogiton



Water Requirements:

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Sun Exposure:

Full Sun

Sun to Partial Shade


Grown for foliage


Foliage Color:

Unknown - Tell us


4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)


36-48 in. (90-120 cm)


USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

USDA Zone 11: above 4.5 C (40 F)

Where to Grow:

Unknown - Tell us


Unknown - Tell us

Bloom Color:

Scarlet (dark red)

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Winter/Early Spring

Other details:

Unknown - Tell us

Soil pH requirements:

5.1 to 5.5 (strongly acidic)

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

Patent Information:

Unknown - Tell us

Propagation Methods:

From semi-hardwood cuttings

From seed; winter sow in vented containers, coldframe or unheated greenhouse

Seed Collecting:

Allow seedheads to dry on plants; remove and collect seeds


This plant is said to grow outdoors in the following regions:

CARLOTTA, California

Manhattan Beach, California

Norwalk, California

San Francisco, California

Jacksonville, Florida

North Fort Myers, Florida

Honomu, Hawaii

Iredell, Texas

show all

Gardeners' Notes:


On Sep 4, 2014, southeastgarden from Jacksonville, FL (Zone 9a) wrote:

This is a nice shrub in zone 9a Florida. Two year old plants flowered for the first time this spring and flowered again in late summer. The flower spike is larger than the common Callistemon citrinus.


On Aug 13, 2005, enceebones from great yarmouth,
United Kingdom wrote:

I have an Callistemon laevis which I would love to know more about. (ie watering, cuttings etc.) Looks very similar to glaucus.


On Jul 14, 2004, pokerboy from Canberra,
Australia (Zone 8b) wrote:

A beautiful Australian Native shrub that grows to 1-2m tall - 1.5m wide when established. It's striking red flowers atrractive Native Fauna in Australia. Great in a sunny position to a semi-shaded spot. Quite tolerant of dry conditions and Frost. Flowers in Spring to Autumn (Fall). pokerboy.


On Apr 12, 2003, Bug_Girl from San Francisco, CA wrote:

We have a lot these trees in our area. It is a nice tree that will take less water once established. I do recall them having a kind of spike of the branches which makes them more difficult to prune or remove if over-grown. They like full sun and can take either sand or clay conditions.

If used as a street tree don't park your car under one becauses they drop the red flowers all over your car. If it is near your house as a street tree you will have to clean up those red flowers constantly. Most people don't bother, and it becomes an huge mess on the street. However, it is attractive and vigorous.