Zinnias add bold, vibrant color to gardens. The more you cut, the more they bloom! Heat-loving and very easy to grow. Space plants of small kinds 8-10" apart, taller kinds up to 18" apart. Cut and Come Again Mix. Burpee's favorite double zinnia. Long-stemmed flowers 2½" across are wonderful for cutting as well as in the garden. They keep on blooming from midsummer to frost. Blend of pink, bright scarlet, yellow, salmon, white and more.