Azumi XL Blue China Aster is a vigorous, early-blooming cultivar of Callistephus chinensis bred for robust growth and prolific flowering. This open-pollinated variety thrives in hardiness zones 2-11, making it adaptable across nearly all North American climates. From seed to first blooms takes 105-120 days, with flowers opening in shades of blue that make stunning cut arrangements or garden borders. The compact growth habit and 6-inch spacing requirement mean you can pack plenty of color into small areas, whether in containers or landscape beds.
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Moderate
2-11
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Moderate
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The Azumi XL Blue series arrives as a new vigor in the China aster world, with early flowering that doesn't sacrifice stem length or bloom quality. Transplant seedlings 6-8 weeks before planting out for the strongest results, and the variety responds well to heat and reduced daylength, which actually triggers more prolific blooming. Fresh flowers stay vibrant in water when cut at the right stage, and dried blooms retain their striking blue color beautifully.
Azumi XL Blue excels as a cut flower, with stems tall enough to carry substantial blooms to the vase. The compact plants also work beautifully in garden borders, where their blue flowers create bold color blocks without sprawling or overwhelming neighboring plants.
No timeline data available yet for this variety.
Sow seeds 1/8 inch deep into 72-cell flats or seedling containers 6-8 weeks before your planned transplant date. Maintain soil temperatures between 70-80°F for reliable germination. Heat and reduced daylength initiate flowering, so starting early ensures vigorous growth before blooms begin.
Transplant seedlings into the garden once soil temperature reaches 65-70°F. Establish plantings early in the season to maximize stem length before heat and shorter days trigger flowering.
Direct seed once soil temperature reaches 65-70°F. Space seeds appropriately for 6-inch final spacing.
For cut flowers, harvest when the outside ray florets just begin to open, then place stems immediately in water to maximize vase life. For dried arrangements, wait until blooms are fully open before cutting and drying.
Pinching is not required for this variety; the compact growth habit naturally produces branching without intervention.
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