Aster (Symphyotrichum spp.)

Share this plant

Asters are herbaceous perennial plants known for their daisy-like flowers, which bloom in late summer to fall. They are valued for adding vibrant color to gardens late in the growing season and are popular for their ability to attract pollinators.

Common Name Aster
Scientific Name Symphyotrichum spp. (formerly Aster spp.)
Native Range (area) Asters, specifically those belonging to the genus Symphyotrichum, are native to North America. They are commonly found across a wide range of habitats, including meadows, prairies, open woodlands, and along roadsides. Asters are particularly prevalent in the United States and Canada, where they thrive in diverse climates, from the cooler regions of the Northeast and Midwest to the warmer areas of the Southeast. These plants are well-adapted to a variety of environmental conditions, which has contributed to their widespread distribution across the continent. Their ability to flourish in different soils and climates makes asters an essential part of native plant gardens and natural landscapes, where they provide late-season color and support for pollinators.
Varieties Zone 8's mild winters and warm summers provide a favorable environment for growing a wide variety of asters. Here are some cultivars that thrive particularly well in this zone:
  1. Symphyotrichum novae-angliae 'Purple Dome':
    • Description: This compact cultivar is known for its deep purple, semi-double flowers and dense growth habit.
    • Height: 18-24 inches tall.
    • Features: Ideal for borders and mass plantings. It is resistant to powdery mildew and provides vibrant color in late summer to fall.
  2. Symphyotrichum oblongifolium 'October Skies':
    • Description: This cultivar is noted for its low, mounding habit and profusion of light blue flowers.
    • Height: 18-24 inches tall.
    • Features: Aromatic foliage and long-lasting blooms make it perfect for garden edges and naturalized settings.
  3. Symphyotrichum novi-belgii 'Marie Ballard':
    • Description: A classic cultivar with pale lavender-blue flowers that bloom profusely in late summer and fall.
    • Height: 3-4 feet tall.
    • Features: Tall and vigorous, it's great for adding height to the back of borders or in wildflower gardens.
  4. Symphyotrichum laeve 'Bluebird':
    • Description: Known for its clear blue flowers and strong, upright stems.
    • Height: 3-4 feet tall.
    • Features: Extremely hardy and tolerant of a wide range of soil conditions, making it a reliable choice for many garden settings.
  5. Symphyotrichum ericoides 'Snow Flurry':
    • Description: A ground-covering aster with small, white, star-like flowers that blanket the plant in late summer to fall.
    • Height: 4-6 inches tall.
    • Features: Excellent for rock gardens, slopes, or as a ground cover in sunny areas.
  6. Symphyotrichum oblongifolium 'Raydon's Favorite':
    • Description: This cultivar produces lavender-blue flowers with a golden center, providing a striking contrast.
    • Height: 2-3 feet tall.
    • Features: It has a pleasant aroma and is extremely hardy, making it a favorite for late-season blooms.
Physical Description Asters typically grow between 1 to 6 feet tall, depending on the species and variety. They have slender stems with lance-shaped leaves. The flowers are daisy-like, with a central disk surrounded by numerous ray florets. The flower heads are usually small, about 1 to 2 inches in diameter, but bloom in dense clusters, creating a mass of color.
Benefits
  • Attracts pollinators such as bees, butterflies, and beneficial insects.
  • Provides late-season color when many other perennials have finished blooming.
  • Suitable for cutting gardens and floral arrangements.
  • Some species are important for native and wildlife gardens.
Requirements
  • Plant in well-drained soil with adequate moisture.
  • Full sun to partial shade, depending on the variety.
  • Space plants according to their mature size to ensure good air circulation.
Care
  • Water regularly, especially during dry spells, to maintain even soil moisture.
  • Deadhead spent flowers to encourage continued blooming.
  • Divide clumps every few years in spring or fall to maintain plant health and vigor.
  • Mulch around plants to retain moisture and suppress weeds.
  • Monitor for common pests and diseases like powdery mildew and aphids.
Colors: , , , ,
Bloom Times:
Sunlight: ,
Soil Type:
Lifespan:
Foliage Type:
Flower Type:
USDA Hardiness Zone: , , , , , , , , , , ,
Scroll to Top

Stay in the Know

Get Gardening in the Mid-South, plus important updates from the Memphis Area Master Gardeners—including upcoming events, programs, and application announcements.

* indicates required