Annual. Dwarf Zinnia Pompon brings color and butterflies to the garden all summer. A mix of bright colors with fully double flowers, Pompon is perfect for smaller yards and gardens. Bushy plants are covered with cheerful flowers all season — just deadhead to keep them flowering. About 16 inches tall. Zinnias can be started inside and transplanted out when the weather warms; or direct seed after danger of frost. 3 gram packet = approximately 300 seeds.