Acacia Species, Australian Blackwood, Black Acacia, Hickory, Sally Wattle, Tasmanian Blackwood

Acacia melanoxylon

Family: Fabaceae (fab-AY-see-ee) (Info)
Genus: Acacia (a-KAY-see-uh) (Info)
Species: melanoxylon (mel-an-oh-ZY-lon) (Info)



Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Requires consistently moist soil; do not let dry out between waterings

Sun Exposure:

Sun to Partial Shade



Foliage Color:



over 40 ft. (12 m)


6-8 ft. (1.8-2.4 m)


USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Where to Grow:

Unknown - Tell us


Unknown - Tell us

Bloom Color:


Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Flowers are fragrant

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Winter/Early Spring

Other details:

May be a noxious weed or invasive

Soil pH requirements:

5.6 to 6.0 (acidic)

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:


Propagation Methods:

Scarify seed before sowing

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored


This plant is said to grow outdoors in the following regions:

Carlsbad, California

Eureka, California

Tustin, California

Dunnellon, Florida

Gardeners' Notes:


On Nov 23, 2009, butch1 from Eureka, CA wrote:

I have a 15 year old Acacia melanoxylon growing like gang busters in Eureka California. It has not suckered at all and in 15 years has grown perfectly straight to 50 feet, has a base diameter of 1.5 feet, and flowers and sets seed without fail every year. It has endured temps. as low at 25 degrees with no ill effects. I really like this tree and it thrives even though it is growing in close proximity to large coast redwoods which suck the water from the soil with their greedy root system.


On Mar 24, 2005, pete2255 from South East,
United Kingdom (Zone 8a) wrote:

Fairly hardy being able to take at least -6 deg C.Grows fast as all acacias but forms a more tree like plant.
Suckers readily if roots near surface damaged. Suckers make propagation easy.


On Jun 2, 2004, angelam from melbourne,
Australia wrote:

This is one of the few acacias which is long lived and will form a shade tree (many acacias are quite short lived and will drop dead after 8 years or so). We have one about 10m high. The flowers are not as dense as many acacias but they are attractive to birds.


On Jun 12, 2003, kennedyh from Churchill, Victoria,
Australia (Zone 10a) wrote:

This Australian tree is an important timber tree, whose beautiful wood is much prized for furniture making. I have used veneers of this species in marquetry work. It is an Acacia, but unlike many Acacias, it does not retain its pinnate leaves. The true leaves are replaced by 'phyllodes', which are expanded leaf stalks. It starts off with pinnate leaves and one can watch the transition to its adullt leaf-form as the tree develops. Like most Australian Acacias, the seed has a very hard coating and can last for very many years and still germinate. We recently grew some Blackwoods for a revegetation project from seed collected in 1951. To get the seed to germinate, the favoured method is to pour boiling water over the seeds in a container and allow the water to cool and then sow the seed.
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