Bull banksia (Banksia grandis)

Bull banksia

Bull banksia (Banksia grandis) is an evergreen shrub that will grow from 3.5 to 7 m tall. It blooms in summer with creamy white flowers that attract bees, butterflies and nectar-eating birds. The 30 cm long cylindrical flowers take up to 10 years to flower from seed.

Scientific classification

Species

Bull banksia (Banksia grandis)

Proteas, lotuses, planes, and allies

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Perennial

Lifespan

Tree

Plant Type

All year round

Bloom Time

5 m to 15 m

Plant Height

Evergreen

Leaf type

15 - 38 ℃

Ideal Temperature

Images of Bull banksia

Culture

Interesting Facts

Bull banksia grows very slowly, so it is rarely cultivated. Its flowers were steeped in water by indigenous peoples to create tea. Nectar can also be sucked out of a plucked flower. The nectar is well-liked by birds, bees, and butterflies. Bull banksia cones are regularly used as wood-turning pieces, and Australian markets are replete with banksia vases, jewelry boxes, etc.

Name Story

Bull banksia: The Banksia plants are named for Sir Joseph Banks, a British naturalist who traveled on Captain James Cook's first great voyage and advocated for the colonization of Australia. The epithet, grandis, means "grand" or "large," since bull banksia tends to be bigger than most other Banksia species.

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Care Guide for Bull banksia

Every 2-3 weeks

Water

Full sun

Sunlight

15 - 38 ℃

Ideal Temperature

Water: Originating from Australia's arid regions, bull banksia exhibits high drought tolerance and deep root systems for moisture extraction. It thrives in well-draining soils with minimal watering—every 2-3 weeks. Bull banksia's growth is aligned with seasonal rainfall, making it ideal for xeriscaping.

Fertilize: For optimal health, bull banksia requires a balanced fertilization regime, high in nitrogen during spring for foliage and flower development. In fall, reduce nitrogen and frequency for winter hardening. Follow product guidelines to avoid over-fertilization, and use protective gear during application.

Pruning: Bull banksia, valued for its distinctive leaves and appealing flower spikes, thrives with proper pruning techniques. Focus on removing dead branches and light shaping during its dormant period in early to late winter. Clean, sharp tools promote healthy growth, enhance flowering, and improve air circulation.

Propagation: Bull banksia propagates effectively from fresh seeds. Treat seeds with fungicide before sowing in well-draining sandy soil, maintaining consistent moisture. Smoke treatment can enhance germination. Transplant seedlings to individual pots, taking care with their sensitive root systems.

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