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Acacia cultriformis

knife-leaf wattle

A small evergreen tree to 4m, though occasionally trailing/prostrate. The 'leaves' are small silver-green triangles and the flowers bright yellow clusters of little pom-poms in spring

Other common names

knife acacia

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Ultimate height

2.5–4 metres

Time to ultimate height

10–20 years

Ultimate spread

1.5–2.5 metres

Loam

Sand

Chalk

Moisture

Well–drained

pH

Acid, Neutral, Alkaline

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

Sheltered

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Fabaceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Bushy, Spreading branched, Trailing
Genus: Acacia can be deciduous or evergreen trees, shrubs or climbers, with alternate, pinnately divided leaves or simple modified leaf-like stalks (phyllodes), and tiny, sometimes fragrant, flowers in short spikes, or in racemes or spikes of spherical heads
Name status: Correct
Plant range: New South Wales

How to grow

Cultivation

Grow in neutral or slightly acid/alkaline, well-drained soil in a sheltered site in full sun. Tolerant of salt. For more advice, see shrub cultivation

Propagation

Propagate by semi-ripe cuttings or seed. For more information see propagating from seed (tree/shrub

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Mediterranean climate plants
Wall side borders
Banks and slopes

Pruning

Pruning group 8

Pests

May be susceptible to glasshouse red spider mite, fluted scale and mealybugs

Diseases

May be susceptible to honey fungus

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