Sky Blue Aster
Symphyotrichum oolentangiense
Sky Blue Aster is a perennial for focal point, mid-border, suited to full sun to partial shade and clay or loam, flowering Sep, Oct.
| Type | Perennial |
|---|---|
| Mature height | 75 cm |
| Spread | 45 cm |
| Aspect | full sun to partial shade |
| Foliage | Deciduous |
| Hardiness | USDA 3a-8b |
| Pollinator-friendly | Yes |
| Pet-safe | Yes |
Where to use it in a border
At around 75 cm, it sits best toward the back of a border, or on its own as a focal point with room around it. Give it about 45 cm of room to spread, roughly 2 to the metre when planted in a drift. It is hardy across USDA zones 3a to 8b, so check it suits your area before planting.
It appears in our lists of full sun, clay soil, pollinator-friendly plants, pet-safe plants.
Border Builder uses Sky Blue Aster's height, spread, soil, bloom months and companions to place it in a full border plan for your own conditions, on iPhone and iPad.
Flowering through the year
Worth knowing
- Its flowers are valued by bees and other pollinators.
Good companions
Plants that share its conditions and style, chosen to complement its place in the border:
- Blanket Flower 'Arizona Sun'to edge in front
- Bottle Gentianto edge in front
- Bunchberryto edge in front
- Canada Mayflowerto edge in front
- Chokecherryfor height behind it
- Compass Plantfor height behind it