This plant is said to grow outdoors in the following regions:
Marietta, Georgia
Geneseo, Illinois
Machesney Park, Illinois
Sioux Center, Iowa
Royal Oak, Michigan
Underwood, Minnesota
Coshocton, Ohio
Pittsburgh, Pennsylvania
South Hill, Washington
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Flower scapes 28". Bright yellow with green edge turning all green through summer. Schaffer/Summers/Ruh 1992.