Smooth Aster vs Twinflower - TreeTime.ca

Smooth Aster vs Twinflower

Symphyotrichum laeve

Linnaea borealis

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Smooth Aster
Twinflower

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.

Twinflower is a native, trailing evergreen ground cover known for its delicate flowers that grow in nodding pairs. These pale pink blooms are described as being sweetly fragrant, attracting native bees and other pollinators.
Growing in cool, moist, acidic soils, the trailing stems form roots as they spread and start to form mats across the forest floor. Due to its woody stem, it is technically classified as a shrub and often referred to as a subshrub or dwarf shrub. This species is well-suited for naturalization, restoration, and conservation projects.
Twinflower (Linneae borealis) was named in honour of Carl Linnaeus, who adopted it as his personal emblem.

Smooth Aster Quick Facts

Twinflower Quick Facts

Zone: 3a
Zone: 2a
Height: 0.9 m (3 ft)
Height: 0.1 m (0.4 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.9 m (3 ft)
Light: partial shade, full sun
Light: any
Moisture: dry, normal
Moisture: normal, wet
Growth rate: very fast
Growth rate: slow
Life span: short
Life span: short
Growth form: creeping or trailing, ground cover
Spreading: stolons - medium, seeds - low
Suckering: none


Fall colour: reddish tinge
Flowers: purplish-blue; daisy-like
Flowers: Pink, bell-shaped, fragrant pairs
Bloom time: late summer to early fall
Bloom time: 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, NL, YT, NT, NU, PE
Other Names: glaucous aster, smooth blue aster
Other Names: northern twinflower, pink bells