Hardiness: USDA Zone 4a: to -34.4 °C (-30 °F) USDA Zone 4b: to -31.6 °C (-25 °F) USDA Zone 5a: to -28.8 °C (-20 °F) USDA Zone 5b: to -26.1 °C (-15 °F) USDA Zone 6a: to -23.3 °C (-10 °F) USDA Zone 6b: to -20.5 °C (-5 °F) 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)
On Apr 8, 2008, Malus2006 from Coon Rapids, MN (Zone 4a) wrote:
Here in Minnesota they tend to be uncommon in the wild, preferring undisturbed habitation as they tend to lose competition with cattails and becoming more common the further south you go but I have seen them in certain roadside ditches where mowing have keep populations of cattails down before they have spread.
In garden experience, they do well in a gallon pot kept overwinted in the pond. The plants that I have had a strange habit of going dormant early, about early September - when this first happen the first two years, I thought they had died as they tend to be late into coming up compare to the other water plants I have and on one occident I was about to throw them away spring 2007 when I felt the roots and shoots and find that they were still healthy.
On May 19, 2004, smiln32 from Oklahoma City, OK (Zone 7a) wrote:
The leaves have long petioles and arrowhead shaped leaf blades to 10 inches long. Submerged leaves are lance-shaped or even bladeless. The ½ to 1 inch wide 3 petaled white flowers appear in late spring and summer. This is the most common arrowhead of eastern North America. It grows at low elevations in shallow water on the fringe of ponds, lakes, streams and wet ditches. Also called Also called Duck Potato or Wapato because of its edible egg-shaped rhizomes.
On Oct 15, 2003, shaney from Framingham, MA (Zone 6a) wrote:
Arrowhead is native to North America and common in shallow water. It is a vigorous spreader, so if you grow it in a pond, it's better to keep it in a pot! Arrowheads grow tubers on their roots that are edible. Native Americans used to harvest them in the fall by digging in the mud with their toes. The tubers I tried were about an inch or two across and tasty when steamed, though bitter if not fully cooked. I have grown this in a 3 foot tub, in 6-12" of water and it was very easy and pretty.
This plant has been said to grow in the following regions:
Venus, Florida Athens, Georgia Between, Georgia Benton, Kentucky New Orleans, Louisiana Naval Academy, Maryland Valley Lee, Maryland Framingham, Massachusetts Mason, Michigan Minneapolis, Minnesota Sedalia, Missouri Frenchtown, New Jersey Blossvale, New York Fruit Hill, Ohio Laflin, Pennsylvania Mercersburg, Pennsylvania Centertown, Tennessee