Callistemon comboynensis (Cliff Bottlebrush) is a plant native to Australia, and can be used for bonsai. It grows up to 5-10 ft tall, forming a large shrub. This small Callistemon species is a spreading shrub up to 10 ft high, with copper colored new growth and narrow, elliptical leaves. Flowers are usually dull red brushes up to 4 inch, attracting butterflies and hummingbirds.
In order to get the most out of this plant, its best grown in full sun and requires well drained, damp soil that can range from sand, loam, or clay, can tolerate neutral to alkaline soil and should be pruned after its flowering has finished. Moderately frost tolerant, Callistemon comboynensis is attractive for a container plant, growing well in USDA Zone 9-11.
In terms of growing and plant care, this species prefers regular water and thrives in full sun to semi shade. For colder regions in which this plant is grown in a pot, it should be protected from harsh winter winds and provide shelter from extreme temperatures. These conditions allow the Callistemon comboynensis to take advantage of its beauty and fragrant flowers with bold colors of red, crimson and vinous.