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In June – August, saturated purple-blue flowers thickly fringed with fine petals cover this erect, clump-forming hybrid, their yellow center disks brightly punctuating the garden. It will happily grow in even crack or crevice, good-naturedly accommodating drought or clay, though sandy soil is ideal. This low-maintenance, exuberant plant is long-blooming, long-lived, and is loved by butterflies! It more than earns its keep. 2.5' T x 2' W
In Greek eri means early and geron means old man in reference, respectively, to the early bloom time and downy plant appearance suggestive of a white beard.
Minimum temperature: -20° F