Reed grass (Calamagrostis brachytricha) is a clump-forming ornamental grass that transforms gardens with its dramatic late-season presence. Growing 3 to 4 feet tall in hardiness zones 4 through 9, this warm-season grass produces delicate pinkish flower plumes in late summer that rise well above its mound of narrow, stiff green foliage. The plumes mature to soft tan by fall, creating an airy, almost ethereal effect in the landscape. It thrives in full sun and adapts to heavy clay soils where many ornamental grasses struggle, making it a reliable choice for challenging growing conditions.
Full Sun
Moderate
4-9
48in H x 36in W
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Moderate
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The pinkish tinged flower plumes that float above the foliage in late summer and mature to a luminous light tan are genuinely arresting. Unlike many ornamental grasses that demand pristine, well-draining soil, reed grass actually performs best in medium to wet soils and handles heavy clay with ease. Its tolerance for black walnut and urban conditions means it can anchor difficult garden spaces where other grasses simply won't establish.
Reed grass is grown as an ornamental grass for garden structure and visual interest. Its mounded form, delicate flower plumes, and seasonal color shifts make it valuable in naturalistic landscape designs and mixed borders where textural contrast is desired.
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Cut clumps to the ground in late winter just before new shoots emerge. This rejuvenates the plant for the growing season and allows fresh foliage to develop cleanly.
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