PlantFiles: Hygrophila
Hygrophila polysperma

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Family: Acanthaceae (ah-kanth-AY-see-ee) (Info)
Genus: Hygrophila (hy-GRO-fill-uh) (Info)
Species: polysperma (pol-lee-SPER-muh) (Info)

Category:
Ponds and Aquatics

Height:
12-18 in. (30-45 cm)

Spacing:
Unknown - Tell us

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)

Sun Exposure:
Sun to Partial Shade
Light Shade

Danger:
Unknown - Tell us

Bloom Color:
Medium Blue

Bloom Time:
Unknown - Tell us

Foliage:
Unknown - Tell us

Other details:
May be a noxious weed or invasive

Soil pH requirements:
Unknown - Tell us

Patent Information:
Unknown - Tell us

Propagation Methods:
From herbaceous stem cuttings

Seed Collecting:
Unknown - Tell us

Profile:

No positives
1 neutral
2 negatives

Gardeners' Notes:

Rating	Author	Comment
Negative	caron	On Nov 25, 2004, caron from Woodland Park, CO (Zone 4b) wrote: U. S. FEDERALLY LISTED NOXIOUS WEED. Not allowed for import to the US and not allowed in any interstate or intrastate transportation without a specific permit from USDA APHIS PPQ (Plant Protection and Quarantine).
Negative	jdurha	On Aug 26, 2004, jdurha from North Clarendon, VT wrote: FYI: This plant is a Class A Noxious Weed in the state of Vermont. Its movement, importation, sale, possession, cultivation and/or distrbution is prohibited with fines upto $1000.00 possible
Neutral	Groundhog	On Nov 14, 2002, Groundhog from Bronx, NY wrote: This common aquarium plant has been listed as a noxious weed by the USDA. Only member of the genus which does not normally grow emersed. Interestingly, it turns aquarium water acidic over time. Very hardy, it can be invasive in mild zones. Has pretty blue flowers, though.

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