Smooth Aster vs Upright Prairie Coneflower - TreeTime.ca

Smooth Aster vs Upright Prairie Coneflower

Symphyotrichum laeve

Ratibida columnifera

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Smooth Aster
Upright Prairie Coneflower

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 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 Quick Facts

Upright Prairie Coneflower Quick Facts

Zone: 3a
Zone: 3b
Height: 0.9 m (3 ft)
Height: 0.6 m (2.0 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: 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: purplish-blue; daisy-like
Flowers: golden yellow sometimes with red-brown; has long central cone
Bloom time: late summer to early fall
Bloom time: early summer to early fall
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


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