Smooth Aster vs Early Blue Violet - TreeTime.ca

Smooth Aster vs Early Blue Violet

Symphyotrichum laeve

Viola adunca

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Smooth Aster
Early Blue Violet

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.

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 Quick Facts

Early Blue Violet Quick Facts

Zone: 3a
Zone: 2a
Height: 0.9 m (3 ft)
Height: 0.1 m (0.3 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.2 m (0.5 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: very fast
Growth rate: 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: purplish-blue; daisy-like
Flowers: purple to blue-violet
Bloom time: late summer to early fall
Bloom time: mid spring to early summer
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, YT, NT
Other Names: glaucous aster, smooth blue aster
Other Names: dog violet, hookedspur violet, sand violet, western blue violet