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Used by the Cherokee as a potherb, it's been a favored native perennial in gardens (and one of those that went to Europe, and has come back as named cultivars).
'Herbstsonne' (= fall sun) is a popular one, and there's apparently a double-flowered version called 'Hortensia.'
Ours is robust in spite of being planted in a shallow bed.
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Usually it flowers in June, although sporadic flowering later isn't unusual.