Smooth Aster vs Early Blue Violet - TreeTime.ca

Smooth Aster vs Early Blue Violet

Viola adunca

Symphyotrichum laeve

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Early Blue Violet
Smooth Aster

Early Blue Violet is a low-growing native perennial wildflower valued for its striking early-spring blooms. The flowers range in color from vibrant blue to deep violet, often marked with pale highlights and fine white hairs. They provide an important early nectar source for pollinators and serve as a host plant for several fritillary butterfly species.

It spreads by both seed and rhizomes, gradually forming small colonies. Its dark green, heart-shaped leaves add ornamental appeal, and the plant shows some resistance to deer browsing. Early Blue Violet is well-suited to naturalization projects and pollinator-friendly gardens, and has also been used in coastal butterfly habitat restoration in the Pacific Northwest.

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.

Early Blue Violet Quick Facts

Smooth Aster Quick Facts

Zone: 2a
Zone: 3a
Height: 0.1 m (0.3 ft)
Height: 0.9 m (3 ft)
Spread: 0.2 m (0.5 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: low growing, clump-forming
Spreading: seeds - medium, rhizomes - medium
Suckering: none
Maintenance: medium

Toxicity: rhizomes, fruit, seed poisonous to humans

Flowers: purple to blue-violet
Flowers: purplish-blue; daisy-like
Bloom time: mid spring to early summer
Bloom time: late summer to early fall
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON, QC, NS, NB, YT, NT
Native to: AB, BC, SK, MB, ON
Other Names: dog violet, hookedspur violet, sand violet, western blue violet
Other Names: glaucous aster, smooth blue aster