Plants from the genus Callistephus are half or full hardy annuals.
They are bushy in nature and range in height up to 65 cm. They flower from July to frost in large red, fragrant.
In the garden these plants look great as part of a border; they are also used often as a cut flower in arrangements.
Full sunlight or light shade. Good drainage. Soil pH 5.5 to 7. Rich soil. Regular light watering. Feed with fertilizer two times during the growing season. May need support. Summer mulch. Deadhead.
Weed around plants to prevent competition. Grow in a different location every year. Do not overcrowd.
Do not grow close to a surface that reflects heat.
Grow in an area that has adequate ventilation. It is important to remove plants that have any sign of disease as they pass infections easily to other Callistephus.
Genus - Callistephus
Species - Chinensis
Variety - Roter Edelstein
Common name - Aster
Pre-Treatment - Not-required
Hardiness zones - 3 - 10
Height - 0.70 m
Spread - 0.25 m
Plant type - Annual Flower
Exposure - Full Sun, partial shade
Growth rate - Fast
Soil PH - Mildly acid to neutral (pH 5.5-7)
Soil type - Rich, well drained
Water requirements - Regular light watering
Landscape uses - In the garden these plants look great as part of a border; they are also used often as a cut flower in arrangements.
Bloom season - July - October
Leaf / Flower color - Green / Red
Seeds should be lightly covered once sown. Sow in the spring, following the last frost.
If you plan to grow China Aster as seedlings indoors for later transplanting then they should be germinated at a temperature of +18-+21C for two weeks. Seeds should be sown in peat pots in a vermiculite mix and water supplied from below.
After about seven or eight weeks the seedlings can be planted in the garden in an area of partial shade or full sun with a spacing of 30-50cm.
They prefer to grow in a rich soil that has good drainage and a pH of 6 to 7.
Info source: http://www.gardenershq.com
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