Sweetgrass vs Tufted Hairgrass

Sweetgrass is a cool-season perennial grass best known for its sweet, vanilla-like fragrance. The scent comes from coumarin in the leaves, which is pleasant to humans but has a bitter taste that makes the plant less appealing to deer and other herbivores. As a cool-season grass, Sweetgrass grows most vigorously in spring and fall, slowing or even going dormant during the heat of summer.

It spreads quickly through creeping rhizomes and can be difficult to remove once established, so it is best planted in areas where its spread will not cause problems. Due to its deep, vigorous root system and preference for moist soils, Sweetgrass is especially useful for erosion control, soil stabilization, riparian plantings, and naturalization projects.

Note: Sweetgrass was formerly classified under the scientific name Hierochloe odorata and its subspecies. The subspecies found in Canada are currently considered two distinct species: Anthoxanthum hirtum, which is native across Canada, and Anthoxanthum nitens, which is native to Eastern Canada. Because these two species are alike and share many overlapping common names, they are often considered as only one species.

Tufted Hairgrass is a native perennial bunchgrass that forms dense clumps of dark green foliage. It produces tall, wispy seed heads in late spring and early summer, adding height and texture to the landscape. Its tidy, clump-forming habit and ornamental appeal make it well suited to smaller gardens and yards.

Tufted Hairgrass is a cool-season grass that grows most actively during the cooler parts of the growing season: spring and fall. Its adaptability allows it to establish across a range of sites, while its dense, fibrous root system helps stabilize soil. It is well suited to rangeland and prairie restoration, naturalization, erosion control, and revegetation projects.

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