Aster Azumi XL Blue (Callistephus chinensis) is a tall, elegant annual aster known for its large pompon-style blooms and striking blue color — a hue not typically found in chrysanthemums. Each flower measures 7–7.5 cm in diameter and opens gradually into a full, rounded form with long shelf life. The Azumi XL series produces strong, uniform stems that are easier to grow to height than the Matsumoto or Bonita series and features a top-flowering, spray-type habit ideal for professional cut flower production. With intermediate resistance to Fusarium and a consistent bloom set from late summer through fall, this variety delivers reliable color and form to both garden beds and floral arrangements.
Aster Azumi XL Blue Planting Information
Scientific Name: Callistephus chinensis
Common Name: China Aster
Series: Azumi XL
Color: Blue
Seed Type: Annual
Seed Form: F-Coat
Bloom Type: Pompon
Bloom Size: 7–7.5 cm (2.75–3") diameter
Height (in.): 24–30
Sun Requirement: Full Sun
Moisture: Moderate, well-drained soil
Blooming Season: Late Summer–Fall
USDA Hardiness Zone(s): Annual
Seeding Information:
·Days to Germinate: 7 days at 60–70°F; needs light to germinate
·Planting Depth: 1/8"; lightly cover with vermiculite
·Transplant: 4–6 weeks after sowing
·Spacing: 6–9 inches apart
·Days to Flower: 90–110 days from sowing
·Best For: Greenhouse or field cut flower production