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Acacia cultriformis (Knife Acacia)

Knife Acacia, Knife-Leaf Wattle, Dogtooth Wattle

Acacia cultriformis, Knife Acacia, Knife-Leaf Wattle, Dogtooth Wattle, Evergreen Tree, Evergreen Shrub, Yellow Flowers, Fragrant Shrub, Fragrant Tree
Acacia cultriformis, Knife Acacia, Knife-Leaf Wattle, Dogtooth Wattle, Evergreen Tree, Evergreen Shrub, Yellow Flowers, Fragrant Shrub, Fragrant Tree
Acacia cultriformis, Knife Acacia, Knife-Leaf Wattle, Dogtooth Wattle, Evergreen Tree, Evergreen Shrub, Yellow Flowers, Fragrant Shrub, Fragrant Tree

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
Climate Zones 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Trees
Plant Family Leguminosae
Genus Acacia
Common names Acacia, Wattle
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early, Mid, Late)
Fall
Winter
Height 10' - 20'
(3m - 6.1m)
Spread 10' - 15'
(3m - 4.6m)
Maintenance Low
Water Needs Low, Average
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 Drought, Deer
Attracts Birds
Garden Uses Beds And Borders, Hedges And Screens
Garden Styles Mediterranean Garden, Coastal Garden
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Alternative Plants to Consider

Acacia craspedocarpa (Leatherleaf Acacia)
Senegalia greggii (Catclaw Acacia)
Acacia farnesiana (Sweet Acacia)
Acacia dealbata (Silver Wattle)
Acacia baileyana (Cootamundra Wattle)
Acacia baileyana ‘Purpurea’ (Cootamundra Wattle)
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 9 - 10
Climate Zones 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Trees
Plant Family Leguminosae
Genus Acacia
Common names Acacia, Wattle
Exposure Full Sun, Partial Sun
Season of Interest Spring (Early, Mid, Late)
Summer (Early, Mid, Late)
Fall
Winter
Height 10' - 20'
(3m - 6.1m)
Spread 10' - 15'
(3m - 4.6m)
Maintenance Low
Water Needs Low, Average
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 Drought, Deer
Attracts Birds
Garden Uses Beds And Borders, Hedges And Screens
Garden Styles Mediterranean Garden, Coastal Garden
How Many Plants
Do I Need?
Not sure which Acacia to pick?
Compare Now

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