Bluejoint vs Showy Aster - TreeTime.ca

Bluejoint vs Showy Aster

Calamagrostis canadensis

Eurybia conspicua

CUSTOM GROW

CUSTOM GROW

Bluejoint
Showy Aster

Bluejoint is a native perennial grass that forms tall, dense colonies. It is one of the most abundant grasses found in Canada and the United States. The extensive shallow root system and spreading rhizomes help stabilise soils, especially in wet meadows, marshes, and along streambanks.
It is a cool-season grass, growing most actively in spring and fall and slowing during the heat of summer. Seeds from its purple-tinged spikes feed birds and small mammals, and the plant itself provides forage for wildlife and livestock, though it does not tolerate heavy grazing. Its tall, dense growth also offers nesting habitat for wetland birds. With these combined values, Bluejoint is well-suited for naturalisation, riparian plantings, and habitat restoration projects.

Showy Aster is a native perennial wildflower recognized for its tall stems topped with clusters of light purple blooms. Blooming from late summer into autumn, it provides an important late-season source of nectar and pollen for pollinators. It also produces seeds that are eaten by birds, extending its value to wildlife beyond the flowering season.

Drought tolerant once established, Showy Aster grows well in urban, rural, and disturbed sites. With its mix of ecological value and ornamental appeal, it is ideal for pollinator gardens, naturalization projects, and ecological restoration.

Bluejoint Quick Facts

Showy Aster Quick Facts

Zone: 2a
Zone: 2b
Height: 1.2 m (4 ft)
Height: 0.6 m (2.0 ft)
Spread: 0.3 m (1.0 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: any
Growth rate: fast
Growth rate: fast
Life span: medium
Life span: short
Growth form: upright, clump-forming
Growth form: upright, colony-forming
Spreading: rhizomes - high, seeds - high
Spreading: rhizomes - medium, seeds - medium


Flowers: purple-blue, with yellow centers
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, NL, YT, NT, NU, PE
Native to: AB, BC, SK, MB
Other Names: bluejoint grass, bluejoint reedgrass, canada blue joint, canada reedgrass, marsh reedgrass
Other Names: western showy aster