Bulbous hardy semi-evergreen perennial with flower heads in shades of blue July-Aug. Ht 70cm
Bulbous semi-evergreen perennial with large lilac-blue flower heads from darker buds July-Aug. Ht to 80cm
Hardy deciduous hybrid with open soft violet-blue flowers on tall stems July-Sept. Ht 80-120cm. Forms imposing clumps in full sun
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