Sweetgrass vs Hairy Golden Aster - TreeTime.ca

Sweetgrass vs Hairy Golden Aster

Heterotheca villosa

Anthoxanthum hirtum/Anthoxanthum nitens (Hierochloe odorata))

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Hairy Golden Aster
Sweetgrass

Hairy Golden Aster is a native perennial wildflower known for its clusters of bright yellow, daisy-like blooms. They bloom from mid-summer into fall, providing late-season colour and a valuable nectar source for pollinators, including a variety of bee species.

Flowers mature into fluffy seed heads and can self-seed readily. Removing spent blooms helps manage their spread, but some people will choose to leave a few seed heads to provide food for birds. Hairy Golden Aster grow in bushy clumps, tolerates poor sandy soils, and once established, are among the most drought-tolerant wildflowers. They are well-suited for pollinator gardens, restoration, naturalization, and xeriscaping projects.

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.

Hairy Golden Aster Quick Facts

Sweetgrass Quick Facts

Zone: 3a
Zone: 1a
Height: 0.5 m (1.5 ft)
Height: 0.5 m (1.5 ft)
Spread: 0.5 m (1.5 ft)
Spread: 0.5 m (1.5 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal, wet
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright, clump-forming
Growth form: arching to upright, colony-forming
Spreading: seeds - high, rhizomes - medium
Spreading: rhizomes - high, seeds - low
Maintenance: medium


Toxicity: toxic if large amounts ingested
Foliage: fragrant, bright green
Flowers: bright yellow, daisy-like
Bloom time: mid summer to early fall
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Other Names: hairy false golden aster, hairy false goldenaster, hairy goldenaster
Other Names: bison grass, buffalo grass, holy grass, sweet grass, vanilla sweetgrass