Callistemon acuminatus, commonly called tapering-leaved bottlebrush, is an evergreen Australian shrub that brings drama and movement to any garden with its distinctive cylindrical flower spikes. These vibrant inflorescences emerge in late spring through early summer, their bottlebrush-like shape packed with showy stamens that hummingbirds and butterflies find irresistible. Hardy in zones 9-11, this medium to large shrub reaches 3-10 feet tall with a 4-7 foot spread, thriving in full sun with minimal fuss once established. It tolerates drought, wind, salt spray, and heat with impressive resilience, making it equally at home in coastal gardens or inland landscapes.
Full Sun
Moderate
9-11
120in H x 84in W
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High
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The tapering-leaved bottlebrush commands attention with its exotic flower structure, long narrow foliage with distinctive acuminate tips, and ability to bloom consistently from late spring into summer. Beyond its ornamental appeal, this Australian native handles tough conditions that would stress other shrubs, tolerating salt spray, wind, heat, and drought once established while remaining deer-resistant. It needs little maintenance beyond occasional pruning to encourage bushier growth, yet delivers abundant nectar for hummingbirds and butterflies season after season.
This shrub serves primarily as a striking ornamental and as a hedge plant, where its dense evergreen foliage and repeated blooming make it especially effective. Its nectar-rich flowers position it as a critical plant for supporting bird and pollinator populations in warm-climate gardens.
No timeline data available yet for this variety.
Plant in spring when soil is warm and frost danger has passed. Space plants 4-7 feet apart to allow for mature width. Ensure the planting site receives full sun and has well-draining soil.
Prune after the main flush of blooms in summer to maintain shape and create a bushier, denser habit. Light pruning works well on this shrub, and it responds readily to shaping cuts without becoming ungainly.
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“Callistemon acuminatus hails from the rocky, forested slopes and mountainsides of coastal Queensland and New South Wales in eastern Australia, where it evolved to thrive in challenging terrain. The genus name itself celebrates this plant's most striking feature: kalli meaning beautiful in Greek paired with stemon, meaning stamen, a direct reference to the showy stamens that define the bottlebrush inflorescences. The plant made the journey from Australian native species to horticultural staple through its discovery by Western gardeners seeking plants that could handle heat, drought, and coastal salt spray without requiring intensive care.”