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Amsonia t. v. s. is a late spring and summer bloomer that wants a position in partial shade where it can enjoy direct sunlight only during the coolest hours of the day. It has panicles of light blue star flowers atop ferny stems that reach ca. 2.5 feet; fairly dense growth. As an herbaceous plant with golden-orange fall color for a significant period of time it's doubly valuable.
Minimum temperature: -20° F