Callistemon viminalis

How to grow the Callistemon Viminalis bottlebrush

To grow Callistemon viminalis (weeping bottlebrush), choose a sunny site with well-drained soil, although it can tolerate clay and periodic wet conditions once established. This hardy Australian native is adaptable and thrives in both coastal and inland areas. Water regularly during the first year to help establish a strong root system, then reduce frequency as it becomes drought-tolerant. Apply mulch around the base to retain soil moisture and suppress weeds, keeping it away from the trunk. Prune after flowering to shape the plant and encourage dense, bushy growth. Fertilise annually in spring with a low-phosphorus, native-safe fertiliser to support flowering and foliage health. It can grow 4–8 metres tall depending on the variety, with striking red bottlebrush flowers that appear mainly in spring and summer, attracting birds and pollinators. Its graceful, weeping form makes it a popular choice for screening, feature trees, or riparian plantings.

Where is Callistemon viminalis for sale in NZ?

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What is Callistemon viminalis bark used for?

The bark of Callistemon viminalis (weeping bottlebrush) is primarily valued for its ornamental and ecological qualities rather than commercial use. It features a rough, fibrous texture and peels in strips, adding visual interest to the tree’s aesthetic appeal in landscaping. While not widely used in traditional medicine or industry, the bark plays an important role in natural habitats by providing shelter for insects and small fauna. In some indigenous Australian cultures, parts of the plant—including bark—may have been used for practical purposes such as fire-starting material or crafting, but specific widespread uses of C. viminalis bark are limited. Its primary benefit lies in its contribution to biodiversity and its attractiveness as a feature in native gardens.

What height does Callistemon viminalis grow to?

Callistemon viminalis typically grows to a height of 4 to 8 metres, depending on the variety and growing conditions. Some dwarf cultivars, such as ‘Little John’, remain much shorter, while standard forms can develop into small trees with a graceful, weeping habit. In optimal conditions, mature specimens may even reach up to 10 metres.

What is common name for Callistemon viminalis?

The common name for Callistemon viminalis is weeping bottlebrush. This name refers to its gracefully arching branches and the distinctive, brush-like red flowers that resemble a bottlebrush.

What family does Callistemon viminalis belong to?

Callistemon belong to the Myrtaceae family, which is the myrtle family. This plant family includes other well-known genera such as Eucalyptus, Melaleuca, and Leptospermum.

What is the growth rate of Callistemon viminalis?

Callistemon viminalis has a moderate to fast growth rate, typically growing around 30–60 cm per year under ideal conditions. With ample sunlight, regular watering during establishment, and suitable soil, it can quickly develop into a medium-sized tree. Its growth may slow slightly in poor soils or during extended dry periods.