Smooth Aster vs Upright Prairie Coneflower - TreeTime.ca

Smooth Aster vs Upright Prairie Coneflower

Ratibida columnifera

Symphyotrichum laeve

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Upright Prairie Coneflower
Smooth Aster

Upright Prairie Coneflower is a native perennial wildflower known for its vibrant flowers, which range from golden yellow to dark rust-red with yellow edges. Rising on tall, slender stems, the flowers’ drooping petals surround a central cone. They bloom from midsummer into fall, attracting butterflies, bees, and other pollinators. After blooming, the florets on the cone eventually develop into seeds, which provide a food source for birds.

Its upright growth habit allows it to grow in clusters, creating a striking display. Due to its deep taproot, Upright Prairie Coneflower is drought tolerant, making it well suited to dry areas and xeriscape gardens. Low-maintenance and deer-resistant, this wildflower is a great choice for adding vibrant color and ecological value to any landscape.

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.

Upright Prairie Coneflower Quick Facts

Smooth Aster Quick Facts

Zone: 3b
Zone: 3a
Height: 0.6 m (2.0 ft)
Height: 0.9 m (3 ft)
Spread: 0.5 m (1.5 ft)
Spread: 0.6 m (2.0 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: very fast
Growth rate: very fast
Life span: short
Life span: short
Suckering: none
Suckering: none
Maintenance: medium


Flowers: golden yellow sometimes with red-brown; has long central cone
Flowers: purplish-blue; daisy-like
Bloom time: early summer to early fall
Bloom time: late summer to early fall
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB
Native to: AB, BC, SK, MB, ON
Other Names: long-headed coneflower, prairie coneflower, red-spike mexican-hat, yellow prairie coneflower
Other Names: glaucous aster, smooth blue aster