![]() Practice strict garden rotation with China Asters: never plant them in the same spot year after year. This can be adjusted depending on weather conditions, with more frequent watering needed in hot, dry periods and less in cooler, rainy conditions. Typically, watering once every two to three days is sufficient for the first few weeks. If yellow spots become an obvious problem, destroy any infected plant before the condition spreads to others. After transplanting, aster seedlings need regular watering to establish their root system. Mulch around the plants in summer to help keep the roots cool.Ĭallistephus is prone to a bacteria-like organism known as aster yellows. 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. This spacing is key to success later in the season, so please follow the guidance. China Aster seedlings are very susceptible to damping off, so provide good ventilation and only water from below. If starting indoors, provide bright light and a soil temperature of 10-15☌ (65-70☏). Sow indoors 6-8 weeks before planting out, in peat pots or similar. Otherwise direct sow outdoors after the last frost date. Continue reading below for our tips on how to grow China asters from seed. At this time, you can apply an all-purpose, slow-release granular fertilizer around but not touching the seedlings. When the seedlings have two sets of true leaves, thin them to one seedling per interval. There are some tricks to growing healthy, productive plants, but great success can be had by following a couple of tried and true methods. Sow one to two seeds every eight to 36 inches, depending upon the mature dimensions of your aster variety. ![]() They really fill a vase, and they last for days and days. China Asters make some of the loveliest of all cut flowers. ![]()
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