Photo by Melody

PlantFiles: Black Wattle
Acacia mearnsii

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Family: Mimosaceae
Genus: Acacia (a-KAY-see-uh) (Info)
Species: mearnsii (MEARN-zee-eye) (Info)

One member has or wants this plant for trade.

Category:
Trees

Height:
20-30 ft. (6-9 m)
30-40 ft. (9-12 m)
over 40 ft. (12 m)

Spacing:
15-20 ft. (4.7-6 m)
20-30 ft. (6-9 m)

Hardiness:
USDA Zone 10a: to -1.1 C (30 F)
USDA Zone 10b: to 1.7 C (35 F)
USDA Zone 11: above 4.5 C (40 F)

Sun Exposure:
Full Sun
Sun to Partial Shade

Danger:
Unknown - Tell us

Bloom Color:
Pale Yellow

Bloom Time:
Mid Spring
Late Spring/Early Summer

Foliage:
Evergreen

Other details:
May be a noxious weed or invasive
Flowers are fragrant

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:
Unknown - Tell us

Propagation Methods:
From semi-hardwood cuttings
From seed; direct sow after last frost
Scarify seed before sowing

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds
Properly cleaned, seed can be successfully stored

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By kennedyh
Thumbnail #1 of Acacia mearnsii by kennedyh

By kennedyh
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By kennedyh
Thumbnail #3 of Acacia mearnsii by kennedyh

By kennedyh
Thumbnail #4 of Acacia mearnsii by kennedyh

By htop
Thumbnail #5 of Acacia mearnsii by htop

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Thumbnail #6 of Acacia mearnsii by htop

By htop
Thumbnail #7 of Acacia mearnsii by htop

There are a total of 13 photos.
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Profile:

1 positive
1 neutral
1 negative

Gardeners' Notes:

RatingAuthorContent
Positive peejay12 On Nov 21, 2010, peejay12 from Porthleven, Helston, Cornwall
United Kingdom (Zone 9b) wrote:

I bought this plant originally under the name of A. filicifolia, but I think it is A. mearnsii - partly because of its hardiness compared to A. dealbata.

In Southampton, UK(Z9a) it survived -8c in a fairly exposed position while nearby A. dealbata died to ground level.
In Cornwall, (Z9b) I am now growing what I believe is the same species, and again it is growing well and survived a freak frost for Cornwall of -8C. It also retained most of its leaves.
Its hardiness would depend on where the seed was obtained as it is widely distributed along the south of New South Wales. But some plants grow in the Australian Capital Territory - parts of which can be very wet and cold during the winter.

I prefer it to A. dealbata because of its neater shape, and it responds well to tip-pruning. I grow it for its foliage - flowers tend to get killed by the strong winds.

As far as I know it is the hardiest of the feather-leafed acacias and should be tried far more often.

Neutral htop On Mar 7, 2008, htop from San Antonio, TX (Zone 8b) wrote:

I ahve not grown this plant. Black Wattle (Acacia mearnsii) has become naturalized in Hawaii and California.

Negative tonyf On Dec 11, 2004, tonyf from Sydney
Australia wrote:

In Australia it is subject to borers and has a short life span of 5 to 7 years.

Regional...

This plant has been said to grow in the following regions:

Porthleven,



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