Hardiness: 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)
On Dec 27, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:
Giant Salvinia, Water Fern, Kariba Weed, Aquarium Water Moss, Koi Kandy, Butterfly Fern, Cat's Tongu Salvinia molesta is naturalized in texas and other States and is considered an invasive noxious plant.
It is prohibited in Texas.
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 permit from USDA APHIS PPQ (Plant Protection and Quarantine).
On Jun 12, 2004, weedseed from Ferndale, MI wrote:
Giant Salvinia is illegal to sell in the U.S. It is possibly the worlds worst aquatic weed. It grows very rapidly. It severely diminishes the habitat for fish and other living creatures in the body of water.
Check out what happened to Lake Wilson in Hawaii when someone dumped Salvinia into it.
On Nov 15, 2003, dogbane from New Orleans, LA (Zone 9a) wrote:
I believe this is an invasive exotic in Louisiana which outcompetes duckweed, an important food source for migratory waterfowl. It may be another species that I am thinking of, but it is definitely a Salvinia that we are having a problem with.
This plant has been said to grow in the following regions: