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Acorus gramineus (photo courtesy of Denver Botanic Gardens)
Acorus gramineus (photo courtesy of Denver Botanic Gardens)

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Zone
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Full, Partial
Ample Water
Ample

Acorus

Sweet Flag
Araceae
Ornamental grasses and grasslike plants, Perennials, Aquatic

Found throughout the Northern Hemisphere, these bog or aquatic plants will succeed in water or in rich, well-irrigated soil. They look like clumps or tufts of iris but are related to calla (Zantedeschia). Flowers are inconspicuous. Use in damp borders, at pool edges, or in shallow water.

Acorus calamus

Sword-shaped leaves in an upright clump about 2 ft. wide. Foliage is delightfully fragrant when bruised, as are the thick rhizomes. Plants die back in winter but return in spring. The popular variety ‘Variegatus’ has showy white-bordered leaves. 

Acorus gramineus
Acorus gramineus

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Acorus gramineus

Fans of 6–12-in., narrow, semievergreen leaves 1 1/2 in. wide rise from the ends of slowly creeping rhizomes that eventually form large clumps.

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