Callistephus (Aster)

Growing and Harvesting Callistephus (China Asters)

Callistephus, or China asters, are a valuable addition to any cut flower garden, offering a wide range of colors and forms that enhance floral arrangements. Callistephus chinensis is the main species grown for cut flowers, producing daisy-like flowers with a central disc surrounded by colorful ray petal, including single, semi-double, and double blooms.
Callistephus can be used in various floral arrangements, adding vibrant color and texture. They are often used in mixed bouquets and as focal flowers providing bright colors and a variety of shapes. Their sturdy stems make them easy to work with.
Asters prefer cool temperatures and are best grown in spring or fall in regions with hot summers.
Start seeds indoors 6-8 weeks before the last frost date or sow directly in the garden after the danger of frost has passed. Seeds should be lightly covered with soil.
Transplant seedlings into the garden when they are about 7 – 10 cm tall, spacing them 20 – 30 cm apart to allow good air circulation and reduce disease risk. For a continuous supply of blooms, practice succession planting by sowing seeds every few weeks.
Keep the soil consistently moist but not waterlogged. Apply a balanced fertilizer every few weeks. Rotate planting locations each year to prevent soil-borne diseases such as fusarium wilt and aster yellows. Harvest flowers when they are fully open but not overly mature.