Intermediate
skill rating
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Acacia cultriformis (Knife acacia)
2 hours care
per year
per year
6m
Max height
Max height
4m
Max spread
Max spread
20-50 Years
To maturity
To maturity
Low
Toxicity
Toxicity
Plant details
Botanical name
Acacia cultriformis
Other names
Knife acacia, Knife-leaf wattle, Dogtooth wattle
Genus
Acacia Acacia
Species
A. cultriformis - A. cultriformis is a tender, erect then spreading, evergreen shrub or small tree with flattened, oval to triangular, blue- to grey-green leaf stalks (phyllodes) and racemes of spherical, bright yellow-flower heads in spring. Flowers are followed by long, green seed pods.
Acacia cultriformis is: Evergreen
Habit
Erect, Spreading
Toxicity
All parts may cause severe discomfort if ingested.
Flower
Yellow in Spring
Foliage
Blue-green in All seasons
How to care
Watch out for
Pests
Generally pest free. Resistant to deer.
Specific pests
Bark borer , Glasshouse red spider mite , Mealybugs Bark borer , Glasshouse red spider mite , Mealybugs
Root rot Root rot
General care
Pruning
Pruning group 8. Does not respond well to hard pruning.
Propagation methods
Seed, Semi-hardwood cuttings
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Where to grow
Acacia cultriformis (Knife acacia) will reach a height of 6m and a spread of 4m after 20-50 Years.
Suggested uses
Banks and Slopes, City, Flower Arranging, Greenhouse, Hedging/Screens, Mediterranean, Specimen tree, Wallside and trellises
Cultivation
In warm areas, grow outdoors in moderately fertile, well-drained, neutral to acid soil in a sheltered, sunny site. Mature height is variable and dependent upon growing conditions/site. Drought tolerant but best with occasional watering in dry summers. Dislikes humid climates. Under glass, grow in loam-based compost in full light. In growth, water freely and feed monthly; sparingly in winter.
Soil type
Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Indoor unheated (H2)
Companion plants
We do not currently have companion plants added for this plant.
Botanical name
Acacia cultriformis
Other names
Knife acacia, Knife-leaf wattle, Dogtooth wattle
Genus
Acacia Acacia
Species
A. cultriformis - A. cultriformis is a tender, erect then spreading, evergreen shrub or small tree with flattened, oval to triangular, blue- to grey-green leaf stalks (phyllodes) and racemes of spherical, bright yellow-flower heads in spring. Flowers are followed by long, green seed pods.
Native to
Australia
Foliage
Evergreen
Habit
Erect, Spreading
Toxicity
All parts may cause severe discomfort if ingested.
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Colour
Flower
Yellow in Spring
Foliage
Blue-green in All seasons
How to care
Watch out for
Pests
Generally pest free. Resistant to deer.
Specific pests
Bark borer , Glasshouse red spider mite , Mealybugs
Specific diseases
General care
Pruning
Pruning group 8. Does not respond well to hard pruning.
Propagation methods
Seed, Semi-hardwood cuttings
Monthly care advice
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Where to grow
Acacia cultriformis (Knife acacia) will reach a height of 6m and a spread of 4m after 20-50 Years.
Suggested uses
Banks and Slopes, City, Flower Arranging, Greenhouse, Hedging/Screens, Mediterranean, Specimen tree, Wallside and trellises
Cultivation
In warm areas, grow outdoors in moderately fertile, well-drained, neutral to acid soil in a sheltered, sunny site. Mature height is variable and dependent upon growing conditions/site. Drought tolerant but best with occasional watering in dry summers. Dislikes humid climates. Under glass, grow in loam-based compost in full light. In growth, water freely and feed monthly; sparingly in winter.
Soil type
Loamy, Sandy
Soil drainage
Well-drained
Soil pH
Acid, Alkaline, Neutral
Light
Full Sun
Aspect
South, West
Exposure
Sheltered
UK hardiness Note: We are working to update our ratings. Thanks for your patience.
Indoor unheated (H2)
USDA zones
Zone 10, Zone 9
In order to add a note on this plant, please add this plant to your plant lists.
| This plant likes... | Garden match | |
| Soil types: | Loamy, Sandy | Tell us... |
| Soil drainage: | Well-drained | Tell us... |
| Soil pH: | Acid, Alkaline, Neutral | Tell us... |
| Light: | Full Sun | Tell us... |
| Aspect: | South, West | Tell us... |
| Exposure: | Sheltered | Tell us... |
| Hardiness: | Indoor unheated (H2) | Tell us... |
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