Callistephus chinensis These divinely sumptuous, dark amethyst blooms are reminiscent of football mums—big, billowy and colorful. An easy-to-grow border/cutting flower, this series is very heavy blooming, growing on 20 inch tall, semi-branching plants. The 3–4 inch flowers reveal a central yellow disk when fully open. Excellent vase life. Dead-head plants for longer bloom time. Germination code: (1) or (4)