PVR. Large flower heads of mid violet-blue flowers over a long period from June-Sept. Ht 80-100cm. Strappy evergreen foliage may need winter protection.
Large heads of pale blue flowers with a darker cobalt-blue bar on tall strong stems July-Sept. Ht 90-120cm. Evergreen in milder locations.
Bulbous semi-evergreen perennial forming bold clumps of strappy leaves. Rich blue flower heads on rigid stems July-Sept. Ht 60-80cm
Bulbous perennial with broad strappy leaves and large mid-blue flowers July-Sept. Ht 90-120cm. Deciduous
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