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.
Cosmos will flower more in poor soil, rather than rich, so avoid manures and fertilizers. Pinch out the growing point when plants are around 45cm (18″) tall to encourage bushier growth and more flowering points. Water during very dry spells, but otherwise, Cosmos is well suited to xeriscaping. Seeds are easy to harvest and save.
These annual plants that are sometimes referred to as Cosmea.
Cosmos bipinnatus & C. sulfureus
Season & Zone
Exposure: Full sun
Direct sow from early March right up until mid-June. Several sowings will result in a very long bloom period. You can also start Cosmos indoors in February to early March for transplanting late March to mid-April. Seeds will sprout in 3-10 days. Optimal temperature for germination: 21-25°C (70-75°F).
Sow seeds very shallowly only a few millimeters (1/8″) deep. Thin or transplant to 20-25cm (8-10″) apart.