One of my favourite, exotic-looking trees at this time of year is the Persian silk tree, Albizia julibrissin 'Rosea'. When not in flower earlier in the season,…
Acacia genus (Mimosa). This genus contains over 1200 species, which range from low-growing shrubs to tall upright trees. Over 700 are native to Australia. They are also common in tropical and subtropical Africa (most African species have vicious spines and are referred to as ‘thorn trees’). Acacias have either bipinnate leaves or have flattened leaf stalks. The small, fragrant flowers range from deep yellow to white and are crowded into globular heads or cylindrical spikes. The fruit are either round or flattened pods. Acacias generally are legumes and therefore can 'fix' nitrogen into the soil.
Deciduous or Semi-evergreens, Fragrants
C S America, Kenya, Polynesia and Australia
The name Acacia comes from the Greek 'akazo' - I sharpen. Many of the species have sharp spines.
Tiny flowers composed of massed stamens, and for their foliage.
Frost hardy to frost tender, min 5-7C. They require full sun and well-drained soil. Under glass, use a loam-based potting compost with full light. Outside, moderate fertile soil and full sun.
Propagate by seed in the spring. Soak them in warm water until swollen first. Root semi-ripe cuttings in summer.
Red spider mite, scale insects and mealy bug.
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