Botanical Name: Symphyotrichum novae-angliae ‘Purple Dome’

Common Name: New England Aster

Hardiness Zone: Perennial in Most Climates (USDA Zones 3–8)

Size: 18–24" Tall × 18–24" Spread

Growth Habit: Compact, Rounded, Mounded Habit

Sunlight: Thrives in Full Sun

Soil: Prefers Moist, Well-Drained Soil; Adapts to Average Garden Soils

Water Needs: Moderate; More Consistent Moisture Improves Flowering

Bloom Season: Late Summer through Fall

Fertilizer: Light Feeding in Spring; Avoid Excess Nitrogen

Features: Rich Purple Daisy-Like Blooms, Golden Yellow Centers, Excellent Fall Color, Pollinator Magnet

Uses: Ideal for Pollinator Gardens, Perennial Borders, Native Plantings, Fall Displays, and Mass Plantings

Patent: ❌ Not Patented

Propagation: ✔ Propagation Allowed

See our complete Aster Plant Guide for more care tips

More About Aster ‘Purple Dome’

Aster ‘Purple Dome’ is one of the most reliable and widely planted fall asters, prized for its dense, dome-shaped habit and vibrant purple blooms that completely cover the plant in late summer and fall. The daisy-like flowers feature bright yellow centers that provide strong contrast and remain showy well into the cooler months.

Unlike taller New England asters that can grow leggy or require staking, ‘Purple Dome’ stays naturally compact and rounded. This makes it exceptionally easy to use in designed landscapes, offering late-season color without the maintenance challenges often associated with fall-blooming perennials.

Why We Like It (Our Trials)

In our trials, ‘Purple Dome’ has proven to be a standout performer for dependable fall color and pollinator activity. It begins flowering as many summer perennials fade, extending the garden season and providing critical late nectar for bees and butterflies—especially migrating monarchs.

We also appreciate its strong structure. The plant holds its shape without flopping, even when in full bloom, and pairs beautifully with ornamental grasses, sedums, and other fall-interest plants. With full sun and decent airflow, foliage stays clean and attractive through the season.

Aster ‘Purple Dome’ vs. Other Asters

Compared to taller Symphyotrichum novae-angliae varieties, ‘Purple Dome’ offers a much more controlled size and a fuller, more uniform habit. Traditional New England asters can reach 4–6 feet tall and often need support, while ‘Purple Dome’ delivers the same vibrant color in a compact, garden-friendly form.

When compared to smoother-textured fall asters (Symphyotrichum laeve or S. oblongifolium), ‘Purple Dome’ provides heavier flower coverage and stronger visual impact. For gardeners seeking bold, late-season color with minimal fuss, Aster ‘Purple Dome’ remains one of the best and most dependable choices available.