This plant is said to grow outdoors in the following regions:
Barbourville, Kentucky
Durham, Maine
Farmington, Maine
Moss Point, Mississippi
Auburn, New Hampshire
Tonawanda, New York
Lexington, Virginia
Cathan, Washington
John Sam Lake, Washington
Kalama, Washington
North Marysville, Washington
Priest Point, Washington
Shaker Church, Washington
Stimson Crossing, Washington
Weallup Lake, Washington
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Was planted in the fall and survived a Maine winter in the tender section and bloomed this summer when I was not expecting it to.