Eastern Redbud vs Smooth Aster - TreeTime.ca

Eastern Redbud vs Smooth Aster

Cercis canadensis

Symphyotrichum laeve

COMING SOON

(new stock expected: fall of 2025)

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Eastern Redbud
Smooth Aster

The Eastern Redbud is known for the pea-like pink buds that emerge in clusters on the bark, embellishing the tree in stunning flowers. They have a longer bloom time, sometimes for two to three weeks before the heart-shaped leaves emerge for the summer. Inedible pods emerge that turn brown in the summer, this tree is a part of the bean family.

Native to the Eastern North America. The Eastern Redbud can tolerate acidic and alkaline soil. Plant this as a beautiful understory species or shaded residential yard or garden. The bright pop of color will make an attractive ornamental tree.

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.

Eastern Redbud Quick Facts

Smooth Aster Quick Facts

Zone: 4a
Zone: 3a
Height: 8 m (25 ft)
Height: 0.9 m (3 ft)
Spread: 9 m (30 ft)
Spread: 0.6 m (2.0 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: medium
Growth rate: very fast
Life span: long
Life span: short
Suckering: high
Suckering: none


Flowers: rose-purple, pea-like
Flowers: purplish-blue; daisy-like
Bloom time: late summer to early fall
Seeds: pod-like
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON
Other Names: judas tree
Other Names: glaucous aster, smooth blue aster