Native to Australia, the Crimson Bottlebrush is an evergreen shrub or small tree. Their bright showy red flower-spikes appear in summer and autumn and are made up of a number of individual flowers. The pollen of the flower forms on the tip of a long colored stalk called a filament. It is these filaments which give the flower spike its color and distinctive 'bottlebrush' shape. The flowers can be spectacular and are irresistible to nectar-feeding birds and insects. Most often grown as a shrub, Bottlebrush can be also be trained as a small tree to 15 feet. It makes a nice screen or tall hedge. This fast growing variety is frost tolerant to a temperature of 20 F and is best grown outside in zones 9-11 and the warmer areas of zone 8. In colder climates they make an excellent novelty potted plants that can easily be overwintered inside or in a greenhouse. Germination from seed is easy, requiring no special treatment.