Symphyotrichum oolentangiense - Sky Blue Aster

A most attractive and versatile plant, Sky Blue Aster has numerous spreading flower branches that become covered with dozens of brilliant lavender/blue flowers surrounding a yellow disk in autumn. Easy to grow and drought tolerant, Symphyotrichum oolentangiense does well in a variety of garden settings from dry to moist and its arrow-shaped leaves are most distinctive all season long!


  Late Summer to Fall
  Full Sun to Part Shade
  2' - 3'
  Sand to Clay
  Dry to Moist


Approx. 100 seeds per pack - 2,822 seeds per gram

Attracts Butterflies, Honeybees & Songbirds!
Drought Tolerant!
Makes Great Cut Flowers!


All Wildflower Farm seeds are hardy through growing zone 3, organic and non-GMO.


Indoors: Cold, moist stratification. Start at least 5 weeks before outdoor night temperatures are reliably in the 10 C (50 F) range. Mix the seed with a slightly moistened, sterile, soil-less growing mix. Put this in a labelled, sealed plastic bag and store in a refrigerator for one day. The next day place this in the freezer for one day. Repeat this for one week, alternating between the fridge and the freezer. After stratifying, plant seed 0.32 cm (1/8 inch) deep in pots. Keep moist but not soggy and very warm (21 C - 70 F). When seedlings are 5 cm (2 inches) tall or more, transplant into the garden spaced 30 cm (1 foot) apart.

Outdoors: Plant seed 0.32 cm (1/8 inch) deep in a prepared seed bed in late fall so that the seed overwinters and germinates naturally in spring.

Outdoors Alternative: In late fall through to mid-winter fill plastic pots with a slightly moistened, sterile, soil-less growing mix. Plant seed 0.32 cm (1/8 inch) deep in pots and label the pots. Place them outdoors in an area where they will experience the snow and cold of winter. The seed will germinate in the pots in spring as the weather warms up. Be sure to water the pots regularly in spring and once the plants are 5 cm (2 inches) tall, transplant them into your garden.

Symphyotrichum oolentangiense - Sky Blue Aster

  • Product Code: C19060
  • Availability: In Stock
  • $5.95