Smooth Aster vs Yellow Hedysarum - TreeTime.ca

Smooth Aster vs Yellow Hedysarum

Hedysarum sulphurescens

Symphyotrichum laeve

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Yellow Hedysarum
Smooth Aster

Yellow Hedysarum is a native perennial wildflower recognised for its clusters of bright yellow pea-like blooms. It adds colour to grasslands, roadsides, and open woods. It is also a nitrogen fixer, which helps improve soil fertility. Because of its deep root system, it contributes to slope and soil stabilisation.

The plant provides forage for wildlife and cover for small animals, especially its roots. Its flowers attract pollinators such as bees.

Yellow Hedysarum plays an important role in prairie and foothill ecosystems. It is well-suited for ecological restoration, naturalisation, pollinator gardens, and erosion control projects.

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. As a perennial, it dies back to the crown each winter, it will regrow from the base in the spring. Avoid disturbing the crown during late winter to ensure healthy growth the following season.

Yellow Hedysarum Quick Facts

Smooth Aster Quick Facts

Zone: 2b
Zone: 3a
Height: 0.5 m (1.5 ft)
Height: 0.9 m (3 ft)
Spread: 0.2 m (0.8 ft)
Spread: 0.6 m (2.0 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: fast
Growth rate: very fast
Life span: short
Life span: short
Growth form: ascending to upright
Spreading: seeds - low
Suckering: none


Flowers: creamy yellow, in dense spikes
Flowers: purplish-blue; daisy-like
Bloom time: late spring to summer
Bloom time: late summer to early fall
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC
Native to: AB, BC, SK, MB, ON
Other Names: sulphur hedysarum, sulphur sweet-vetch, yellow sweet-vetch
Other Names: glaucous aster, smooth blue aster