Acacia Mearnsii - Black Wattle - Evergreen Trees Direct

Acacia Mearnsii - Black Wattle

$120.00

Tax included. Shipping calculated at checkout.

Size: 30cm/33cm

30cm/33cm 40cm/45L

All stock is grown, maintained and graded in strict accordance with AS 4373-2007, Australian Standard for Nursery Stock.

Current Stock Height Guides

40cm/45L: 2m – 2.5m Approx.

Height guide disclaimer: Height ranges are approximate only. As living products, plant heights naturally vary between individual plants, batches, and seasons. No guarantee is given that supplied plants will fall within the stated range. If minimum heights are required, you mustconfirm current batch heights with Evergreen Trees Direct prior to purchase. Variation in height is normal and is not grounds for return, refund, replacement, or compensation.

Mature Height & Width

Mature Height: 6–10 m

Mature Width: 4m – 6m

Acacia Mearnsii - Black Wattle is expected to grow Approx. 80 – 120 cm/year (Very fast).

Root Ball Dimensions

Use this as a reference when digging your planting hole. We recommend digging at least 10% wider than the dimensions below to encourage strong root development.

30cm Pot: 33cm (W) × 30cm (D)
40cm/45L Pot: 44cm (W) × 41.5cm (D)
50cm Pot / 70L Pot: 55cm (W) × 41.8cm (D)
100L Bag: 50.6cm (W) × 52.8cm (D)
150L Bag: 66cm (W) × 55cm (D)
200L Bag: 71.5cm (W) × 60.5cm (D)
300L Bag: 88cm (W) × 63.8cm (D)
400L Bag: 99cm (W) × 66cm (D)
500L Bag: 122cm (W) × 66cm (D)
750L Bag: 134cm (W) × 69cm (D)
1000L Bag: 146.3cm (W) × 71.5cm (D)
2000L Bag: 176cm (W) × 82.5cm (D)

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Shipping

Shipping is calculated at checkout based on the pallet space your order occupies in the truck and your delivery location.

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Contact

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Email: sales@evergreentrees.com.au

Phone: (03) 7042 3318

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About Your New Acacia Mearnsii - Black Wattle

The Acacia mearnsii – Black Wattle is a fast-growing, evergreen native tree (6–10m H × 4–6m W) with a dense, rounded canopy and fine-textured, dark green bipinnate foliage. It looks excellent in rural landscapes, large native gardens, or along boundary lines where fast coverage, shade, or shelter is needed. Bright yellow, ball-shaped flowers appear from late winter to early spring, attracting pollinators and adding strong seasonal contrast.

Acacia mearnsii – Black Wattle thrives in full sun to part shade and adapts to poor, dry, or degraded soils. Drought-tolerant once established and ideal for windbreaks, erosion control, reforestation, and habitat planting.

Use where rapid establishment and resilience are priorities. Best suited to larger areas—avoid in confined or formal garden spaces.

Enriched Planting Mix (AO Certified)

$21.95

Features and Benefits

Organically certified product
Improves aeration for roots
A rich blend of Pure Magic Compost, composted animal manure, Gypsum, composted coarse bark and wetting agent
Excellent to mix with heavy clay soils, an organic mixture with added gypsum which is perfect for exotic plants
Revitalises tired soils, adds nutrient and organic matter, no chemical additives, weed free
Assists in retaining moisture in the soil longer after rain or watering

Directions For Use

Water plant well at least several hours prior to planting.
Dig a hole at least twice the width of the pot and 7cm deeper than the pot.
Mix Grow Better Enriched Planting Mix with the soil that has been dug out of the hole, adding about 1/3 planting mix.
Spread a 7cm layer of improved soil in the hole and remove plant from the pot. Tease roots gently if the root ball is very firm and place plant in the planting hole. Check that pot soil is level with the surrounding soil surface level, not higher or lower.
Fill in the hole with improved soil mixture, firm down soil and water well adding Grow Better Plant Starter to final watering.

View full details

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Enriched Planting Mix (AO Certified)

$21.95

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Uses in my Garden

Screening or Privacy
Windbreak
Rural Property Planting
Revegetation or Regeneration

Acacia Mearnsii - Black Wattle works in an:

Australian Native Garden – celebrates local plants with natural character.
Woodland Garden – layered, naturalistic design under dappled light.
Wildlife Garden – planting to attract birds, bees, and pollinators.
Low-maintenance Garden – resilient choices for easy care and year-round appeal.

Is Acacia Mearnsii - Black Wattle Evergreen or Deciduous?

Acacia Mearnsii - Black Wattle is an Evergreen (foliage year round) Tree

Mature Height & Width

Mature Height: 6–10 m

Mature Width: 4m – 6m

Acacia Mearnsii - Black Wattle is expected to grow Approx. 80 – 120 cm/year (Very fast).

Growth Rate of Acacia Mearnsii - Black Wattle

Acacia Mearnsii - Black Wattle is expected to grow Approx. 80 – 120 cm/year (Very fast).

They are considered to have a:

Fast Growth Rate

Frost Tolerance & Ideal Climate to plant Acacia Mearnsii - Black Wattle

Is Acacia Mearnsii - Black Wattle frost tolerant?

Acacia Mearnsii - Black Wattle is Frost Hardy – Survives heavy and frequent frost without damage.

Does Acacia Mearnsii - Black Wattle Flower?

Acacia mearnsii produces abundant pale-yellow globular flowers through late winter and spring. The blooms form in dense clusters along the fine, ferny foliage, creating a soft yet impressive seasonal display that brightens the cooler months.

Does Acacia Mearnsii - Black Wattle flower?

Yes - Flowers

Flowering Period:

Spring
Summer

Flower Type:

Fluffy

Flower Colour:

Yellow

Is Acacia Mearnsii - Black Wattle an Australian Native Tree?

Yes

Acacia Mearnsii - Black Wattle is Native to South-eastern Australia, including Victoria, Tasmania, New South Wales, and South Australia, where it grows naturally in open forests, woodlands, and along watercourses.

What is the Wildlife Value of Acacia Mearnsii - Black Wattle ?

Its dense, spreading canopy offers valuable shelter for small birds, while its pollen-rich flowers attract native bees, beetles and beneficial insects that contribute to a healthy, biodiverse garden ecosystem.

How much Sunlight does Acacia Mearnsii - Black Wattle need?

Acacia Mearnsii - Black Wattle will thrive best in:

Full Sun

Preferred Soil?

Acacia mearnsii performs best in well-drained sandy or loam soils and tolerates slightly acidic to neutral conditions. It may struggle in heavy clay or poorly drained areas unless improved with organic matter to boost aeration and drainage. Keep soil evenly moist during establishment, then reduce watering as the tree matures and becomes more drought resilient.

Is Acacia Mearnsii - Black Wattle Drought Tolerant?

Is Acacia Mearnsii - Black Wattle Drought tolerant?

As a young tree it benefits from regular watering, but once established Acacia mearnsii develops good drought tolerance. It remains resilient through dry periods and performs reliably in low-maintenance landscapes with minimal supplementary watering.

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How To Plant Your Acacia Mearnsii - Black Wattle

Site: Choose a well-drained position in full sun to part shade with room for the canopy to develop.

Soil preparation: Enrich the planting area with quality compost and aged manure for a strong establishment phase.

Hole: Dig twice as wide as the root ball and the same depth.

Planting: Position level with the surrounding soil, backfill gently, firm in, then water deeply to settle the roots.

Recommended Planting Spacing For Your Acacia Mearnsii - Black Wattle

Hedging and screening: 1 to 1.5 metres apart for a dense informal screen, or 80 centimetres apart for a tighter formal hedge.

Feature tree: 3 to 4 metres apart to allow the full canopy and form to develop.

Avenue planting: 3 metres apart for a uniform soft-textured avenue.

Acacia Mearnsii - Black Wattle is expected to grow Approx. 80 – 120 cm/year (Very fast).

Fast Growth Rate

Long Term Care For Your Acacia Mearnsii - Black Wattle

Watering: Water deeply twice weekly through the first 12 months. Once established, this is drought tolerant and only needs a deep soak during extended dry periods.

Mulching: Apply a 5 to 7 centimetre layer of organic mulch over the root zone, keeping it 5 centimetres clear of the trunk.

Pruning: Tip prune in late winter and again in summer to build dense growth. For a formal hedge, light shaping two to three times a year keeps lines crisp.

Fertilising: Apply a slow-release native blend in early spring and again in autumn. Avoid high-phosphorus formulations as a precaution.

Pest and disease: Hardy against most pests and diseases. Occasional inspection in warm humid conditions is all that's needed.

Planting Your Acacia Mearnsii - Black Wattle in Different Soil

Acacia Mearnsii performs best in well-drained sandy loam or loam with a slightly acidic to neutral pH. Adaptable to a wide range of soils when drainage is improved with organic matter.

Sandy soil: Free-draining and ideal. Mulch well to maintain consistent moisture.

Clay soil: Improve drainage with gypsum and organic compost before planting.

Loam: The preferred soil for steady root development and consistent growth.

pH: Slightly acidic to neutral preferred. Mulch with composted leaf litter to maintain levels naturally.