Cosmos bipinnatus. Breathtaking Snow Puff Cosmos seeds produce fully double flowers in pure white like little clouds in the garden. This is part of the Fleuroselect winning "Double Click" series from France. bred for shorter. stronger stems. Snow Puff cosmos seeds flowers will bloom all summer on plants that grow 60-80cm (24-31") tall. Deadhead spent flowers and Snow Puff remains tidy and fresh looking all summer long. from June well into August. This drought tolerant variety is good for xeriscaping as well as long lasting cut flowers. The double flowers will arouse interest and compliments in your organic flower garden.