Acacia mearnsii
Acacia mearnsiifam. Fabaceae
Educational content — not medical, botanical, or professional advice. Plant identification, safety, and edibility depend on local conditions, cultivars, and correct identification. Consult a qualified botanist or forager before consuming or handling wild specimens. How we source & review →
Pl. 189E — Acacia mearnsii
Acacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsiiAcacia mearnsii
IOverview
Overview
Acacia mearnsii, commonly known as black wattle, is a tree native to the southeastern regions of Australia, including New South Wales, South Australia, Tasmania, and Victoria. This fast-growing plant thrives in full sun and moist, light (sandy) or medium soil types, making it adaptable but preferring well-drained conditions. Known for its edible seeds, which are used in various culinary applications, black wattle is also valued for its ornamental qualities. One distinctive feature of this tree is its ability to grow up to 10 meters tall, while another notable characteristic is its light green foliage and yellow flowers that add a splash of color to the landscape.
Quick answers
What is Acacia mearnsii?
Acacia mearnsii, commonly known as black wattle, is a tree native to the southeastern regions of Australia, including New South Wales, South Australia, Tasmania, and Victoria.
Growingconditions · propagation · uses
VCultivation
Cultivation
Acacia mearnsii thrives in full sun and requires moist soil that is light (sandy) or medium in texture. It grows well in hardiness zones 8-11, making it suitable for temperate regions. The plant can reach a height of 10 meters and is native to New South Wales, South Australia, Tasmania, and Victoria. For propagation, seeds are the recommended method. Ensure the soil remains consistently moist but avoid overwatering to prevent root rot.
Light
Full sun
Water
Moist
Soil
Light (sandy), Medium
Hardiness
8-11
Mature size
10.0 m tall
For first-time growers
How to grow Acacia mearnsii for the first time
8steps
Start with planting Acacia mearnsii in a sunny spot, and follow these steps for success.
- 1
What you'll need
Seeds or seedlings, a trowel, watering can.
- 2
Best time to plant
Plant seeds in spring when the soil is warm.
- 3
Soil and container prep
Choose light, well-draining soil. Ensure containers have drainage holes.
- 4
Sowing or transplanting
Direct sow seeds 1-2 cm deep. Transplant seedlings after they've grown a few leaves.
- 5
First two weeks
Water regularly to keep the soil moist but not waterlogged. Protect from strong winds.
- 6
Ongoing care
Provide full sun and regular watering, especially during dry spells. Prune lightly in late winter.
- 7
Harvest or pruning
Prune in late winter to maintain shape and encourage new growth.
- 8
Common mistakes
Overwatering, planting in heavy soil, neglecting to prune.
VIEdible & utility
Edible & utility
Edible parts:Seed
Edible uses: The Acacia mearnsii seed is edible and can be consumed raw or roasted. It is often ground into a flour for baking or mixed with other flours to make breads and porridge. The seeds are also sometimes used in making tea.
Other uses:Fire starterCover cropWind breakerSoil reclamationErosion controlTanninLumberNitrogen fixer
Contextrange · companions · related
VIIDistribution
4 native · 26 introduced
Distribution
4 native · 26 introducedDistribution across4 continents· 4 native· 26 introduced
Europe2 regions
introduced (2)FrancePortugal
Asia3 regions
introduced (3)ChinaNepalSri Lanka
Americas2 regions
introduced (2)JamaicaUnited States
Africa8 regions
introduced (8)Cabo VerdeEritreaEthiopiaLesothoMadagascarMoroccoMozambiqueRwanda
Broader regions
native:New South Wales, South Australia, Tasmania, Victoria
introduced:Cape Provinces, Free State, KwaZulu-Natal, Nansei-shoto, New Guinea, New Zealand North, New Zealand South, Northern Provinces, Réunion, St.Helena
IXSpecimen gallery
1 image
Specimen gallery
1 imageXSee also
8 related
See also
8 relatedPlants you might compare or use together — scored by shared family (Fabaceae), common use cases, and growing requirements.
same family · Fabaceae
Botanical relatives — often share phytochemistry + growing needs.
XI
Explore further
Companion planting
Compare with similar plants
Growing zone
XII
About this entry
- Last updated
- Citation
- How to cite this entry · Submit a correction
Back to the cataloguePlant id · 189eab86-cf08-4385-af6c-28e2e2a1e9aa
Decision aid
Choosing between Acacia mearnsii and something else?
Continue reading
❦❦❦❦
Endpaper · archive updates
Get archive updates
Occasional email when substantial new content lands — plant profiles, seasonal growing notes, folk-remedy additions. Free, no tracking, unsubscribe anytime.