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PlantFiles: Southern Amaranth, Giant Amaranth, Pigweed
Amaranthus australis

 
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Family: Amaranthaceae
Genus: Amaranthus (am-uh-RANTH-us) (Info)
Species: australis (aw-STRAL-iss) (Info)

Synonym:Acnida alabamensis
Synonym:Acnida australis
Synonym:Acnida cuspidata

One member has or wants this plant for trade.

Category:
Biennials
Perennials

Height:
6-8 ft. (1.8-2.4 m)
8-10 ft. (2.4-3 m)
10-12 ft. (3-3.6 m)

Spacing:
Unknown - Tell us

Hardiness:
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)
USDA Zone 11: above 4.5 °C (40 °F)

Sun Exposure:
Sun to Partial Shade

Danger:
N/A

Bloom Color:
Pale Yellow

Bloom Time:
Blooms all year

Foliage:
Unknown - Tell us

Other details:
May be a noxious weed or invasive
This plant is attractive to bees, butterflies and/or birds
Average Water Needs; Water regularly; do not overwater
Requires consistently moist soil; do not let dry out between waterings

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
From herbaceous stem cuttings
From seed; direct sow after last frost

Seed Collecting:
Unknown - Tell us

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Thumbnail #1 of Amaranthus australis by sunflower_info

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Profile:

No positives
1 neutral
No negatives

Gardeners' Notes:

RatingAuthorComment
Neutral Floridian On Jan 11, 2005, Floridian from Lutz, FL (Zone 9b) wrote:

Herbaceous, short-lived perennial with a stout stem that grows to about 1 foot tall. The leaves are alternate on long red or green petioles. The leaves are 4 to 12 inches lone and 2 to 4 inches wide. They’re widest at the base and taper to a point. The plant blooms small yellow flowers along branched, terminal or axillary stalks all year.

Its natural habitat is brackish and freshwater marshes from Florida to Louisiana, Mexico and the West Indies

Regional...

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

Carrollton, Georgia
Trenton, New Jersey



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