Hairpin banksia
Banksia spinulosa · Proteaceae
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around hairpin banksia and prepare for winter.
ID card
- Foliage
- Evergreen, narrow and spiny
- Flowering
- Autumn to spring (September to November in southern hemisphere)
- Mature size
- 1.5 to 3 m tall, 1 to 2 m wide
- Growth
- Moderate to fast
- Hardiness
- Temperate to warm climate, frost-sensitive
- Origin
- Australia (New South Wales)
- Soil type
- Well-drained, acidic, nutrient-poor
Care
Light exposure
Banksia spinulosa requires a sunny location for abundant flowering and compact growth. Place it in full sun for at least 6 hours per day. In partial shade, the plant will become leggy and flower less abundantly.
Watering
Water regularly during the first year of establishment. Once well-rooted, this banksia is very drought-tolerant and only needs watering during very hot or prolonged dry periods. Avoid excess standing moisture, which promotes root rot.
Soil
Banksia spinulosa thrives in very well-drained, preferably acidic and poor soil. A generous addition of sand or drainage material at planting is beneficial. If your soil is alkaline or compacted, consider growing in a pot or amending with peat.
Fertilizing
This shrub naturally tolerates low-fertility soils. A light annual application of low-phosphorus fertilizer in spring is sufficient. Never use fertilizer too high in phosphorus, which disrupts the nutritional balance of Australian Proteaceae.
Pruning and cutting
Prune lightly after flowering to maintain compact form and remove dead branches. Avoid severe pruning on old wood. Cut flowers last well in a vase and enhance floral arrangements.
Diseases and pests
Banksia spinulosa is generally robust. Watch for root collar rot in case of excessive moisture. Some Australian pests may occasionally affect it in favorable climates, but it remains largely unaffected in temperate gardens.
Did you know?
The flowers of Banksia spinulosa, in the form of pointed golden brushes, are a precious source of nectar for Australian birds, particularly lorikeets and honeyeaters. The common English name 'Hairpin Banksia' comes from the distinctive curved shape of its floral styles, which resemble golden hairpins.
Where to buy it
Best planted in autumn so the roots settle in before summer, or in early spring once the frost has passed. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, October, November.
Add this plant to my garden →Plants from the same family
- Juniper-leaf grevilleaGrevillea juniperina
- Rosemary grevilleaGrevillea rosmarinifolia
- Woolly grevilleaGrevillea lanigera
- Southern Silky-oakGrevillea robusta
- Silver banksiaBanksia marginata
- Persoonia linearisPersoonia linearis
Tips generated and checked by Viridia — adapt them to your local climate.