Aster oolentangiensis - Sky Blue Aster
Aster oolentangiensis - Sky Blue Aster - Photo courtesy of Sean James Consulting & Design

Sky Blue Aster

Aster oolentangiensis

Also called Azure Aster

  • AKA Aster azureus or Symphyotrichum oolentangiense
  • Flowers are made up of petals in varying shades of blue surrounding a yellow eye
  • Naturally found in Southern Ontario in dry meadows, edges and open woods
  • Bloom Time: Summer to fall
  • Flower Size: 2.5 cm



60-80 cm

30-60 cm

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Growing and Maintenance Tips:

Plant in average, dry to moist, well-drained soil in full sun. Plant height can vary depending on how rich the soil is and how much moisture is provided. Pinch back 1/3 of the foliage twice before early summer, to maintain shape and foliage vigour.

Additional Notes about Sky Blue Aster:

Native to Ontario