Gazebo Mixed Colors cosmos are container friendly and easy to care for in the garden, too. Drought-tolerant plants prefer warm weather and blossom in shades of pink, white and red. 75-80 days to bloom. Loved by gardens and trusted by gardeners, Burpee© has been introducing fresh garden breakthroughs since 1876. Burpee offers only the highest quality, non-GMO seeds, hand-picked by expert horticulturalists to thrive in your home garden. This annual flower seed is great for all growing zones 1-11. It grows best with full sun.