Blackwood, Australian Blackwood Acacia melanoxylon

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Botanical Name:

Acacia melanoxylon







Common Name:

Blackwood, Australian Blackwood

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  • Acacia melanoxylon

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Growing Info, follow in order:
Scarification: Pour boiling water over seed , let stand in water for 24 hours, repeat process on seed that did not imbibe.
Stratification: none required.
Germination: sow seed 1/4 deep, tamp the soil, mulch the seed bed.
Other: if boiling water treatment does not allow seed to imbibe, sulfuric acid treatment is required.
Physical Characteristics : An evergreen Tree growing to 30 m (98ft 5in) at a fast rate. It is hardy to zone 8. It is in leaf 12-Jan It is in flower in April. The flowers are hermaphrodite (have both male and female organs)It can fix Nitrogen. The plant prefers light (sandy) and medium (loamy) soils and requires well-drained soil.The plant prefers acid and neutral soils..It cannot grow in the shade.It requires dry or moist soil.
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Conservation Plant Characteristics

Acacia melanoxylon R. Br.

Duration Perennial
Growth Habit Tree
Native Status L48 (I), HI (I)
Federal T/E Status
National Wetland Indicator
Active Growth Period Spring and Summer
After Harvest Regrowth Rate
Bloat None
C:N Ratio High
Coppice Potential Yes
Fall Conspicuous No
Fire Resistant No
Flower Color White
Flower Conspicuous Yes
Foliage Color Dark Green
Foliage Porosity Summer Moderate
Foliage Porosity Winter Moderate
Foliage Texture Fine
Fruit/Seed Color Brown
Fruit/Seed Conspicuous Yes
Growth Form Multiple Stem
Growth Rate Rapid
Height at 20 Years, Maximum (feet) 40
Height, Mature (feet) 40.0
Known Allelopath No
Leaf Retention Yes
Lifespan Short
Low Growing Grass No
Nitrogen Fixation Medium
Resprout Ability Yes
Shape and Orientation Erect
Toxicity None
Growth Requirements
Adapted to Coarse Textured Soils Yes
Adapted to Fine Textured Soils Yes
Adapted to Medium Textured Soils Yes
Anaerobic Tolerance None
CaCO3 Tolerance Low
Cold Stratification Required No
Drought Tolerance High
Fertility Requirement Low
Fire Tolerance Medium
Frost Free Days, Minimum 180
Hedge Tolerance Medium
Moisture Use Medium
pH, Minimum 6.0
pH, Maximum 8.3
Planting Density per Acre, Minimum 300
Planting Density per Acre, Maximum 1200
Precipitation, Minimum 16
Precipitation, Maximum 40
Root Depth, Minimum (inches) 28
Salinity Tolerance Low
Shade Tolerance Intolerant
Temperature, Minimum (°F) 14
Bloom Period Early Spring
Commercial Availability No Known Source
Fruit/Seed Abundance High
Fruit/Seed Period Begin Summer
Fruit/Seed Period End Fall
Fruit/Seed Persistence Yes
Propagated by Bare Root Yes
Propagated by Bulb No
Propagated by Container Yes
Propagated by Corm No
Propagated by Cuttings Yes
Propagated by Seed Yes
Propagated by Sod No
Propagated by Sprigs No
Propagated by Tubers No
Seed per Pound 31200
Seed Spread Rate Slow
Seedling Vigor Medium
Small Grain No
Vegetative Spread Rate Moderate
Berry/Nut/Seed Product No
Christmas Tree Product No
Fodder Product No
Fuelwood Product
Lumber Product No
Naval Store Product No
Nursery Stock Product Yes
Palatable Browse Animal Low
Palatable Graze Animal
Palatable Human No
Post Product No
Protein Potential Low
Pulpwood Product No
Veneer Product No
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Description Acacia melanoxylon (Leguminosae) grows as an unarmed, evergreen tree 8-15 (sometimes up to 45) m high, with a straight trunk and dense and pyramidal to cylindrical crown , sometimes with heavy spreading branches. The leaves are bipinnate (feathery) on seedlings and coppice shoots turn into phyllodes . Phyllodes are 7-10 cm long, greyish turning dark dull-green, straight to slightly curved, with 3-7 prominent longitudinal veins and fine net-veins between; often bipinnate on young plants and coppice shoots. Pale yellow, globular flower heads are followed by Reddish-brown pods, narrower than phyllodes, slightly constricted, twisted; flat roundish shiny black seeds 2-3 mm long, seeds almost encircled by pinkish-red seed stalks (aril)" (Henderson, 1995. In PIER, 2002). It has a shallow root system with dense, surface feeder roots. Acacia melanoxylon R. Br. ex Ait. f. foliage and seed pods Acacia melanoxylon R. Br. ex Ait. f. seeds
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