Blue-leaf wattle
Acacia saligna · Fabaceae
📷 Alvesgaspar · CC BY-SA 4.0
The gardener's calendar
In autumn, ease off feeding and take the chance to clean up around blue-leaf wattle and prepare for winter.
ID card
- Foliage
- Evergreen
- Flowering
- Winter to spring (January to April)
- Adult size
- 6 to 8 m tall, slender habit
- Growth
- Fast
- Hardiness
- Mild climate, down to about -5 °C
- Origin
- Australia (New South Wales)
- Soil type
- Well-drained, tolerates poor soils
Care
Sunlight
Place your Acacia saligna in full sun, ideally 6 to 8 hours per day. A south or west-facing exposure promotes generous flowering. In partial shade, growth slows and flowering becomes sparse.
Watering
Water regularly during the first year of establishment. Once well-rooted, watering can be reduced as this acacia tolerates drought. In containers, keep the soil mix lightly moist but never waterlogged to prevent root rot.
Soil and drainage
Choose well-drained soil, even poor or sandy soil. Acacia saligna adapts to chalky and acidic soils. A compost application at planting is sufficient; it doesn't require regular fertilizing.
Fertilizer
A balanced fertilizer application in spring before flowering can support growth. In fertile soil, fertilizer is not essential. Avoid excess nitrogen which promotes foliage at the expense of flowers.
Pruning and shaping
Prune lightly after flowering to maintain a slender, balanced shape. Remove dead or crossing branches. Heavy pruning is generally unnecessary; this acacia grows naturally in a harmonious form.
Diseases and pests
Acacia saligna is generally resistant. In very humid conditions, watch for scale insects and aphids. Good air circulation and optimal drainage prevent most issues. Little susceptible to fungal diseases in Mediterranean or dry climates.
Did you know?
Acacia saligna, native to Australia, has become one of the most widely cultivated acacia species in the Mediterranean region. In North Africa and the Middle East, it has naturalized to the point of forming dense thickets, making it an invasive species in some ecosystems. Its remarkable adaptability and rapid growth make it a tree of choice for reforestation and soil stabilization, but also a fascinating example of the unintended consequences of botanical introductions.
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
- Chinese wisteriaWisteria sinensis
- Common broomCytisus scoparius
- Black locustRobinia pseudoacacia
- Common PeaLathyrus oleraceus
- Honey locustGleditsia triacanthos
- Hairy greenweedGenista pilosa
Tips generated and checked by Viridia — adapt them to your local climate.