Banksia verticillata, the granite or Albany banksia, is a bushy Western Australian shrub (sometimes a small tree) with bright golden flower spikes in summer and autumn. It needs full sun, sharp drainage and dry conditions, as it dies quickly in humid or waterlogged soil.
Family
Proteaceae (Protea family)
Grows as
Tree, Shrub
Light
Full sun
Water
Water sparingly once established and never let the roots sit in wet soil.
Soil
Free-draining, sandy or gritty mix; tolerates shallow rocky soils.
Temperature
10–30 °C; protect from frost and prolonged cold, wet weather.
How easy
Hard
Native range
SW. Western Australia
Climate
subtropical
About
Banksia verticillata, commonly known as granite banksia or Albany banksia, is a species of shrub or (rarely) tree of the genus Banksia in the family Proteaceae. It is native to the southwest of Western Australia and can reach up to 3 m (10 ft) in height. It can grow taller to 5 m (16 ft) in sheltered areas, and much smaller in more exposed areas. This species has elliptic green leaves and large, bright golden yellow inflorescences or flower spikes, appearing in summer and autumn. The New Holland honeyeater (Phylidonyris novaehollandiae) is the most prominent pollinator, although several other species of honeyeater, as well as bees, visit the flower spikes.
How to grow it
Banksia verticillata is seldom seen in cultivation. The natural growing conditions point to a sunny aspect and good drainage as being important in cultivation. It is good for coastal situations and erosion control. Very sensitive to dieback, B. verticillata (like most other western Australian banksias) perishes quickly in humid conditions or poor drainage. It has been grafted successfully onto Banksia integrifolia. Seeds do not require any treatment, and take 19 to 49 days to germinate.
Where it grows
Banksia verticillata is found in scattered populations in two disjunct segments: one clustered around Walpole, and the other around Albany and eastwards to Cheynes Beach. All but one are located within 2 km (1.5 mi) of the coast, the exception is less than 10 km (6 mi) inland. Plants grow on exposed coastal granite outcrops, often in cracks within boulders as well as shallow rocky soils. It is the only Banksia which grows exclusively in a granite soil. It grows in association with Taxandria marginata, Western Australian peppermint (Agonis flexuosa), Andersonia sprengelioides and species of Hakea in scrub and heath.
Text excerpted from the Wikipedia article Banksia verticillata by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.