Aster — King Size White

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Callistephus chinensis. The King Size China Asters are very showy, and make superb cut flowers. King Size White features large, luxuriant flowers that open up to 8cm (3") across, with slightly curled, bright white petals. They top stems around 90cm (35") tall and bloom all summer. The plants are very upright in growth, with numerous multi-branching stems. Be sure to take frequent harvests of cut flowers, or at least keep the plants dead-headed to prolong and enhance the bloom time. Please follow the planting and spacing instructions closely.

Annual

Quick Facts:

Callistephus chinensis seeds
8cm (3") wide flowers
Outstanding cut flowers
Annual

Matures 105-119 days

Size: 0.1g (approx. 50 seeds)

Difficulty
Moderately Challenging

Exposure: Full sun to light shade

Starting

Sow indoors 6-8 weeks before planting out, in peat pots or similar. Otherwise direct sow outdoors after the last frost date. Just cover the seeds. If starting indoors, provide bright light and a soil temperature of 10-15°C (65-70°F). China Aster seedlings are very susceptible to damping off, so provide good ventilation and only water from below.

Growing

Space or transplant 30-45cm (12-18″) apart. This spacing is key to success later in the season, so please follow the guidance. Do not pinch back young plants. Water regularly during dry spells. This plant is particularly sensitive to over-watering, and will not thrive if over-crowded, poorly ventilated, or situated close to a heat-reflecting surface. Mulch around the plants in summer to help keep the roots cool.

Callistephus is prone to a bacteria-like organism known as aster yellows. If yellow spots become an obvious problem, destroy any infected plant before the condition spreads to others. Practice strict garden rotation with China Asters: never plant them in the same spot year after year.

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