Sky Blue Aster (Symphyotrichum oolentangiense) is a seasonal plant with lavender, blue, or purple flowers in fall. They prefer sun to part sun in mesic to dry soil where they grow up to 3 feet tall. They are a good choice for the slopes and banks of bioretention installations. Companion plants include Flowering Spurge (Euphorbia corollata) and Prairie Dropseed (Sporobolus heterolepis).
Maintenance
No serious maintenance needs.
About
Light Requirements
Sun,
Part Sun Moisture Requirements
Banks,
Slopes Soil Requirements
Clay,
Loam,
Most Soils,
Rock,
Sand Height
Short Spacing
1 to 2 feet Category
Seasonal Attracts
Bees,
Birds,
Butterflies Illinois Native Plant Status
Illinois Native,
Indiana Native Bloom Time
September,
October Bloom Color
Blue,
Purple,
Lavender Seasonality
Fall Sociability
Groups of 5-10