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: Full Sun Sun to Partial Shade Light Shade Partial to Full Shade Full Shade
Bloom Color: Inconspicuous/none
Bloom Time: N/A
Foliage: Grown for foliage Evergreen Bronze-Green Velvet/Fuzzy-Textured
Other details: May be a noxious weed or invasive Very high moisture needs; suitable for bogs and water gardens
Soil pH requirements: 4.5 or below (very acidic) 4.6 to 5.0 (highly acidic) 5.1 to 5.5 (strongly acidic) 5.6 to 6.0 (acidic) 6.1 to 6.5 (mildly acidic) 6.6 to 7.5 (neutral) 7.6 to 7.8 (mildly alkaline) 7.9 to 8.5 (alkaline) 8.6 to 9.0 (strongly alkaline) over 9.1 (very alkaline)
On Jan 23, 2005, crimsontsavo from Crossville, TN (Zone 7a) wrote:
Adds a continual splash of color to ponds and slow moving streams. Our fish leave this alone for the most part, eating instead the duckweed and water hyacinths. Reproduces very fast and can be a nuisance. Easily removed as compared to duckweed. Composte unwanted portions and use as plant fertilizer.
Pureed then rolled into a thin patty you can dehydrate Azolla caroliniana and make fish flakes from it. Same to be said about Duckweed.
On Nov 5, 2004, NativePlantFan9 from Boca Raton, FL (Zone 10a) wrote:
This is an aquatic plant that is native to the U.S. and is widely distributed throughout much of the East and Midwestern U.S., from New England south through Florida, westward to Texas and northward to South Dakota and is found in all states in between. It is common in still waters, ponds and rivers.