Mimosa A small to medium growing evergreen tree, Acacia dealbata is relatively fast growing and has grey-green fern-like foliage and fluffy fragrant yellow flowers in Winter and Spring. The Silver Wattle will grow well in neutral to acid, well drained soil in a sheltered spot. This acacia makes a great splash of colour in late Winter. Bees will appreciate the nectar-rich flowers. Site: Requires shelter from harsh windsSoil: Prefers well-drained, neutral to acidic soilPosition: Full sun, partial shadeSeason of Interest: Spring flowering, evergreen Hardiness: Hardy to approx -10°CHeight: 20 to 25ft (6 to 7.5m) Spread: 10 to 15ft (3 to 4.5m)