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Purple to deep blue blooms with a yellow throat are borne above strap-like foliage with prominent midribs. Attractive to butterflies. Deer resistant. Suitable for pond-side, bog or moist garden.
Best in full sun to light shade and moist to wet soils. Tolerant of excessive moisture including bogs. Prefers acidic soil. Can tolerate clay soil.
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During the growing season, it thrives in standing water (up to 6” deep). However in winter, it is intolerant of both standing water and boggy soils where rhizomes may rot.