Alternanthera Species, Alligator Weed, Alligatorweed

Alternantheraphiloxeroides

Genus
Alternanthera (al-ter-NANTH-ur-uh)
Species
philoxeroides (fil-oh-zer-OY-deez)
Synonym
Achyranthes philoxeroides
Alternanthera philoxerina
Telanthera philoxeroides
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
36-48 in. (90-120 cm)
Spacing
36-48 in. (90-120 cm)
Hardiness
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
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)
Bloom Color
White/Near White
Bloom Time
Blooms repeatedly
Other Details
Category
Ponds and Aquatics
Water Requirements
Very high moisture needs; suitable for bogs and water gardens
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
May be a noxious weed or invasive
Soil pH requirements
Patent Information
Non-patented
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From herbaceous stem cuttings
Seed Collecting
N/A: plant does not set seed, flowers are sterile, or plants will not come true from seed
Regional

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

Deland, Florida

Port Saint Lucie, Florida

Cordele, Georgia

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Gardener's Notes:

0
positive
1
neutral
4
negatives
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4
(Zone 9b) | November 2012 | negative

Pulls up easy ...what you don't have to wade out in water to reach...however it is so tender breaks off just as easy leaving the rest of ...Read More

C
Cordele, GA (Zone 8a) | May 2008 | negative

Horrible aquatic weed that has covered my beautiful water lilies in my pond. I am getting ready for war over this weed. Had the county ...Read More

F
Josephine, Arlington, TX (Zone 8a) | November 2006 | negative

Alligator Weed, Alligatorweed Alternanthera philoxeroides ia Naturalized in Texas and other States is considered an invasive noxious plan...Read More

G
| April 2004 | neutral

A perennial herb either free floating or a creeping terrestrial.
Leaves are narrow and elliptical, flowers are a silvery white, ro...Read More

T
T
Murfreesboro, TN (Zone 7a) | July 2003 | negative

Takes up residence in disturbed wetlands, and if not eradicated, can form a thick, tangled mat up to 3 feet thick.

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