Smooth Aster vs Wheat Sedge - TreeTime.ca

Smooth Aster vs Wheat Sedge

Symphyotrichum laeve

Carex atherodes

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Smooth Aster
Wheat Sedge

Smooth Aster is a native perennial wildflower known for its violet-blue, daisy-like flowers. They bloom later in the season, from late summer to early fall. The flowers attract a variety of pollinators, including bees, butterflies, and other beneficial insects. It also serves as a host plant for the Silvery Checkerspot (Chlosyne nycteis) and Pearl Crescent (Phyciodes tharos) butterflies, further enhancing its ecological value. This easy-to-grow wildflower is well suited for native wildflower gardens, pollinator gardens, and naturalization projects.

The Smooth Aster’s non-aggressive root system allows it to spread slowly, and it is more likely to reproduce by seed, which can be controlled through deadheading.

Wheat Sedge is a native perennial sedge commonly found in wetlands, ditches, and along shorelines. It thrives in saturated soils, spreading by rhizomes to form large colonies that stabilize both soils and shorelines. This makes it valuable for wetland and riparian plantings.

Its distinctive, wheat-like seed spikes add seasonal character while providing food for waterfowl, and its dense clumps supply cover and nesting habitat for birds and small animals. Together, these traits make Wheat Sedge an important species for enhancing biodiversity and supporting healthy wetland ecosystems.

Smooth Aster Quick Facts

Wheat Sedge Quick Facts

Zone: 3a
Zone: 2a
Height: 0.9 m (3 ft)
Height: 0.8 m (2.5 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: wet
Growth rate: very fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright, colony-forming
Spreading: rhizomes - high, seeds - low
Suckering: none


Flowers: purplish-blue; daisy-like
Bloom time: late 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, YT, NT
Other Names: glaucous aster, smooth blue aster
Other Names: awned sedge, hairy leaved lake sedge, slough sedge