Crimson Bottlebrush Plant Care

Crimson Bottlebrush (Callistemon citrinus) belongs to the Myrtaceae family within the Callistemon genus. Crimson Bottlebrush is native to Australia. Crimson Bottlebrush is also known as Lemon Bottlebrush, Scarlet Bottlebrush, Bottlebrush.

Crimson Bottlebrush displays an upright, spreading growth habit, reaching up to 10 ft tall with a spread of approximately 8 ft. Crimson Bottlebrush produces showy bottlebrush-like spikes in red, pink, or white.

Leaf size: approximately 3 inches.

Water a young or newly planted Crimson Bottlebrush every 7–14 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established trees mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Crimson Bottlebrush thrives in full sun.

Callistemon citrinus tolerates temperatures of 50–90°F. Crimson Bottlebrush prefers humidity levels of 40–60%.

Well-draining soil mix. Good drainage is essential for Crimson Bottlebrush to prevent waterlogging, which leads to root rot and fungal issues.

Feed Crimson Bottlebrush every month during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established trees in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

The PlantoScan app can remind you when to water and when to fertilize each plant.

Choose a spot with full sun and well-draining soil mix. Avoid low spots where water collects after rain.

Crimson Bottlebrush is suited to USDA Zone 9a – 11b.

Plant container-grown or balled-and-burlapped trees in spring or early autumn, setting the root flare at soil level, and water well after planting.

Crimson Bottlebrush can spread to about 8 ft (2.4 m) and reach about 10 ft (3 m) tall. Space plants about 8 ft (2.4 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the tree spacing calculator.

Prune Crimson Bottlebrush while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the tree in one year.

Crimson Bottlebrush is frost-tender (hardy to USDA zone 9). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

Crimson Bottlebrush can be propagated through stem cuttings or seeds. Similar propagation techniques also apply to weeping bottlebrush plant care, which shares the same genus.

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Crimson Bottlebrush is susceptible to aphids, scale insects, caterpillars. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.

Crimson Bottlebrush grows outdoors in USDA Zone 9a – 11b. It survives winters down to planting zone 9a. Crimson Bottlebrush is native to Australia. In cooler regions, grow Crimson Bottlebrush as a houseplant or bring it indoors before the first frost.