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Hardiness: USDA Zone 7a: to -17.7 °C (0 °F) 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)
A problem anywhere other than controlled in a home pond. DO NOT let it get out into waterways. This is like the water hyacith. Lovely only when it's controlled. Very easy to grow. In my pond, it has overwintered with NO protection for 4 years
On Nov 5, 2007, kittiken from Huntsville, TX wrote:
parrots feather grows well in alkaline soil-tho i've never seen the blooms. each segment will regrow roots n the hotter n more humid it is, the faster it takes over. it is listed in library books for water gardens as a plant that steals oxygen from the water, rather than generating new oxygen. and it is a nuisance when it gets loose.
On Dec 27, 2006, frostweed from Josephine, Arlington, TX (Zone 8a) wrote:
Parrot Feather, Parrotfeather Water Milfoil Myriophyllum aquaticum is naturalized in Texas an other States and is considered an invasive noxious plant. It is prohibited in Texas.
On Feb 7, 2005, DiOhio from Corning, OH (Zone 6a) wrote:
I've had it winter over here in zone 6A as long as the roots were tucked in mud. I used to just let it float but noticed it does much better if planted. I planted some in a new lotus pool last summer and it went bonkers, sprawling way out beyond the edges of the pool. Any part that was out of the water is now mush.
On Feb 6, 2005, henryr10 from Cincinnati, OH (Zone 6b) wrote:
I'm not so sure of the Zone classification.
I have it growing in a barrel outdoors.
It is growing quite well after being totally frozen in the ice.
It maybe needs a Zone 5 or 6 classification at least.
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
On Jun 17, 2004, Wingnut from Spicewood, TX (Zone 8b) wrote:
I just love this plant! It floats around under the surface, feathery "heads" sticking up above the water. Have you ever tried pulling one of the "heads" below water? They don't get wet, but just kind of close up with silvery air bubbles trapped between the fronds. Neat!
These also normally close up at night. Interesting.
On Jan 4, 2003, easter0794 from Seffner, FL wrote:
This is a great plant. It keeps my pond naturally filtered. My gold fish breed in it. It grows very well in Florida. I've shared with lots of pond owners.
Regional...
This plant has been said to grow in the following regions:
Tuscaloosa, Alabama Knights Landing, California San Jose, California Hollywood, Florida Valdosta, Georgia Houma, Louisiana Lafayette, Louisiana Averill Park, New York Cincinnati, Ohio Cleveland, Ohio Glouster, Ohio West Union, Ohio Oklahoma City, Oklahoma Portland, Oregon Salem, Oregon Huntsville, Texas Spicewood, Texas Spring Branch, Texas