75-90 days. Large, showy double to semi-double white flowers bloom all summer long on these easy to grow self-seeding annuals. Pinch plants back early in the season to encourage bushy growth and long stems. Flowers have a long vase life and the lacy greenery makes great background filler in any bouquet. Butterflies and bees enjoy the nectar and seed eating birds will appreciate you leaving some plants to go to seed in the fall. Plants reach 1.4 m and create a wonderful show when massed together in a sunny spot.