Acacia cultriformis (Knife Acacia)
Acacia cultriformis (Knife Acacia) is a small, multi-stemmed, evergreen tree of rounded to vase-shaped habit adorned with silvery-gray leaves shaped like paring knife blades. The foliage remains lovely all year round. In spring, masses of scented, fluffy, yellow flowers cover the branches and create a striking floral display. Relatively long-lived (50 years), Knife Acacia makes a dramatic focal point.
Acacia cultriformis (Knife Acacia) is a small, multi-stemmed, evergreen tree of rounded to vase-shaped habit adorned with silvery-gray leaves shaped like paring knife blades. The foliage remains lovely all year round. In spring, masses of scented, fluffy, yellow flowers cover the branches and create a striking floral display. Relatively long-lived (50 years), Knife Acacia makes a dramatic focal point. It is useful as a barrier or screen and is also perfect for banks and slopes. Its cut branches are attractive in flower arrangements.
- Grows up to 10-20 ft. tall (300-600 cm) and 10-15 ft. wide (300-450 cm). Adds 24-36 in. per year (60-90 cm).
- Performs best in full sun or light shade in dry to moist, well-drained soils. Drought tolerant once established.
- Susceptible to shot hole borer, root rot. Deer resistant.
- Native to eastern Australia.
Requirements
Hardiness | 9 – 10 |
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Climate Zones | 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24 |
Plant Type | Trees |
Plant Family | Acacia |
Exposure | Full Sun, Partial Sun |
Season of Interest | Spring (Early,Mid,Late)Summer (Early,Mid,Late)FallWinter |
Height | 10' – 20' (3m – 6m) |
Spread | 10' – 15' (3m – 4.5m) |
Water Needs | Low, Average |
Maintenance | Low |
Soil Type | Clay, Loam, Sand |
Soil pH | Acid, Alkaline, Neutral |
Soil Drainage | Moist but Well-Drained, Well-Drained |
Characteristics | Fragrant, Showy, Evergreen |
Native Plants | Australia |
Tolerance | Deer, Drought |
Attracts | Birds |
Garden Uses | Beds and Borders, Hedges and Screens |
Garden Styles | Coastal Garden, Mediterranean Garden |