Phantom Hydrangea vs Smooth Aster - TreeTime.ca

Phantom Hydrangea vs Smooth Aster

Hydrangea paniculata Phantom

Symphyotrichum laeve

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Phantom Hydrangea
Smooth Aster

Phantom Hydrangea is a striking deciduous shrub with impressive blooms. It is multi-stemmed and produces pale green flowers that fade to white and soft pink as they mature. These flower clusters can reach up to 15” (40cm) long and while other shrubs will droop from the flowers' weight, Phantom Hydrangea has sturdy stems that support them.

This adaptable shrub will make a beautiful addition to your yard as a flowering hedge or as an ornamental plant on its own. Try pruning the flowers after they are spent to get even larger flower heads.

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.

Phantom Hydrangea Quick Facts

Smooth Aster Quick Facts

Zone: 3b
Zone: 3a
Height: 1.8 m (6 ft)
Height: 0.9 m (3 ft)
Spread: 1.5 m (5 ft)
Spread: 0.6 m (2.0 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal
Moisture: dry, normal
Growth rate: medium
Growth rate: very fast
Life span: medium
Life span: short
Suckering: medium
Suckering: none


Flowers: large white flower clusters
Flowers: purplish-blue; daisy-like
Bloom time: late summer to early fall
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


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