Callistemon rigidus
Common Name: stiff bottlebrush 
Type: Broadleaf evergreen
Family: Myrtaceae
Native Range: Australia
Zone: 9 to 10
Height: 3.00 to 8.00 feet
Spread: 4.00 to 10.00 feet
Bloom Time: Seasonal bloomer
Bloom Description: Red
Sun: Full sun
Water: Medium
Maintenance: Medium
Flower: Showy
Leaf: Fragrant, Evergreen
Other: Winter Interest


Winter hardy to USDA Zones 9-10. Best in moist, fertile, well-drained soils in full sun. Established plants tolerate some soil dryness. In St. Louis, grow in containers that must be overwintered indoors in a bright cool sun room or greenhouse.

Noteworthy Characteristics

Callistemon rigidus, commonly called stiff bottlebrush or erect bottlebrush, is native to Australia. It is a medium-sized, upright, evergreen tropical shrub that will grow to 10-15’ tall in its native habitat. It is commonly grown as a specimen or hedge in frost free areas such as the southern parts of Florida, Texas, Arizona and California. In containers in northern climates, it is typically grown as a 3-5’ tall shrub or trained as a small standard. Flowers feature numerous bushy bright red stamens that encircle the stem in cylindrical spikes (to 4” long) resembling bottlebrushes. Flowers bloom intermittently throughout the year in frost free areas, but more typically in summer in St. Louis. Flowers are attractive to bees. Flowers are followed by small, button-like, brown seed capsules. Narrow, linear, dull green leaves (to 5” long) are fragrant when bruised.

The genus name Callistemon comes from the Greek words kalli meaning "beautiful" and stemon meaning "stamen" in reference to the showy stamens present on most species in this genus.

Specific epithet means rigid or stiff.


No serious insect or disease problems. Watch for spider mites and scale, particularly on indoor plants. Root rot may occur in poorly drained soils.


Container plant. Houseplant.