Also known as Aster Lisse · Delicate Michaelmas Daisy · Glaucous Aster
At-a-glance light, water, soil, and growing conditions from plant data
Full Sun
100% intensity
Prefers at least 6 hours of direct sunlight daily for optimal flowering.
Moderate
50% intensity
Keep soil consistently moist but not waterlogged.
Well-drained
50% intensity
Moderate
50% intensity
Hardy in USDA Zones 3-8. Prefers cooler temperatures for best performance.
Low
25% intensity
Fertilize sparingly in spring; over-fertilizing can reduce blooms.
Safety information from plant toxicity data
| Attribute | Value |
|---|---|
| Toxic for humans | No 0/5 intensity |
| Toxic for pets | No 0/5 intensity |
| Edible | No |
Key traits and growing stats from plant data
Watering, pruning, propagation, and repotting details from plant data
Water regularly during the growing season, especially in dry periods. Allow the soil to dry slightly between waterings. Reduce watering in fall as the plant enters dormancy.
Ensure good drainage to prevent waterlogged roots, which can lead to root rot.
Cut back stems in late fall or early spring to about 10-15 cm from the ground. This encourages bushier growth and prevents the plant from becoming too leggy.
Remove spent flowers throughout the blooming season to prolong flowering and maintain a tidy appearance.
Propagate by division in early spring. Carefully dig up established clumps and divide them into smaller sections, ensuring each section has roots and shoots. Replant divisions immediately into well-prepared soil.
Seeds can also be sown in autumn or stratified indoors.
Established plants generally do not require frequent repotting. If the plant becomes overcrowded or the soil is exhausted, divide and repot in early spring.
This process revitalizes the plant and can help manage its size and vigor in garden settings.
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Photos of Smooth Blue Aster (Symphyotrichum laeve)
Common names and botanical synonyms
Botanical classification
