Horse balm is a native woodland perennial that brings the fragrant charm of the mint family to shaded gardens in hardiness zones 4 through 8. This Missouri native grows 2 to 4 feet tall and produces showy clusters of tiny, bright yellow, two-lipped flowers from August through September that release a distinctive aroma when brushed. Large, sharply toothed leaves stretch 4 to 8 inches long on square stems characteristic of the Lamiaceae family. Growing vigorously in average, well-drained soil with moderate watering needs, horse balm thrives in partial shade and asks for minimal maintenance once established.
Partial Shade
Moderate
4-8
48in H x 36in W
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Moderate
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The fragrant flowers that emerge in late summer create an unexpected pop of yellow in shaded corners, and they're joined by equally aromatic foliage that releases its scent whenever you brush against the plant. Horse balm handles both sandy and clay soils with ease, tolerating even somewhat dry conditions, which makes it refreshingly low-fuss compared to finicky shade perennials. This native plant truly earns its low-maintenance reputation, asking only for partial shade and average soil to flourish.
Horse balm is primarily grown in gardens for naturalization in woodland settings and shaded borders, where its native status and low-maintenance nature make it a straightforward addition to naturalistic planting schemes. The fragrant foliage and flowers can be enjoyed fresh in the garden or used to appreciate the plant's distinctive aromatic qualities.
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“Collinsonia canadensis is native to rich woodlands, ravines, and wooded slopes across Missouri and eastern North America, where it naturally occurs in limestone soils. This species has been part of the native plant palette for generations, growing wild in its preferred forest understory habitat before gardeners recognized its ornamental and aromatic potential for cultivated shade gardens.”