How to Grow Smooth Blue Aster
Symphyotrichum laeve
Your complete guide to growing Smooth Blue Aster.
When to Plant Smooth Blue Aster
Planting windows vary by USDA hardiness zone. Look up yours by ZIP code.
Companion Plants for Smooth Blue Aster
✓ Good companions
Complementary colors and bloom times, attracts beneficial insects and butterflies
Blooms simultaneously, creating mass pollinator habitat and complementary yellow-blue colors
Attracts butterflies and provides height variation while sharing moisture preferences
Provides structural support and creates natural prairie-like conditions
Similar growing requirements and extends aster blooming period with different timing
Shares similar growing conditions and blooms at different times, extending pollinator season
Both attract native pollinators and have similar water and soil requirements
Serves as living mulch at base, retaining moisture and suppressing weeds
✗ Keep away from
Compete heavily for nutrients and can crowd out aster seedlings
Invasive shrub that outcompetes native plants for light and nutrients
Produces juglone which is toxic to asters and inhibits their growth