Kurrajong
Brachychiton populneus · Malvaceae
📷 Philmarin · CC BY-SA 3.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around kurrajong and prepare for winter.
ID card
- Form
- Large tree
- Foliage
- Evergreen, leaves resembling those of the poplar
- Flowering
- May to July, bell-shaped flowers cream or pale pink
- Adult size
- Up to 12 m in height
- Growth
- Fast to moderate
- Hardiness
- Mild climate, sensitive to frost below -5 °C
- Origin
- Australia
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability medium.
Expert tips
The key tip
Large tree requiring heat and full sun; gentle pruning when young (3-4 years old) densifies it, otherwise it remains sparse with dominant apical growth.
The common mistake
In cool climates without sufficient summer heat, flowering can remain sparse for a long time.
The pro's trick
Lightly train the basal lateral branches horizontally in the second year: this triggers branching and creates a beautiful, dense, youthful silhouette.
Seasonal watch
In very dry summers, water young plants; established specimens are much more drought-tolerant.
Care
Exposure
Install your brachychiton in full sun for generous flowering and a well-balanced shape. In very hot regions, some afternoon shade can be beneficial. Avoid overly shaded situations which slow growth and reduce fruiting.
Watering
Water regularly during the first years and during the active growing season. Once established, brachychiton tolerates drought fairly well thanks to its deep roots. Reduce watering in winter and let the soil dry out slightly between waterings.
Soil
Prefer well-drained, fertile soil that is slightly acidic to neutral. Poor or too compact substrate hinders growth. Improve the soil at planting with ripe compost to promote initial rooting.
Pruning
Prune lightly after flowering to maintain a harmonious and balanced shape. Remove dead, crossing, or poorly oriented branches. Avoid severe pruning which can weaken the tree and disturb its natural form.
Fertilizer
Apply balanced fertilizer in spring and early summer to support growth and flowering. Gentle fertilization is sufficient; do not overdo it to avoid creating an imbalance. An annual compost mulch at the base often replaces mineral fertilizer.
Diseases and pests
Generally robust, brachychiton can be affected by scale insects or spider mites in dry climates. Check foliage regularly and act quickly if infestation occurs. Excess water promotes root rot; improve drainage if necessary.
Did you know?
The poplar-leafed brachychiton owes its common name to its leaves which indeed resemble those of poplars, although botanically it is very distant from them. In Australia, this tree produces flattened, papery fruits containing seeds, once used as a food source by local populations. Its presence in Mediterranean gardens symbolizes the influence of 19th-century botanical collections, an era when explorers massively brought exotic species back to Europe.
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.
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Tips generated and checked by Viridia — adapt them to your local climate.