75-90 Days to maturity. Cosmos bipinnatus. Sea Shells Cosmos Seeds. Non-GMO, annual, open-pollinated. This unique cosmos variety has multiple tubular petals that create a unique and captivating shape. Sea Shell Cosmos are trouble-free with very few pests or diseases. Mass plantings are stunning and will attract butterflies and other beneficial insects. They are perfect for borders, fields, wildflower beds, cut flowers, and more! ~ 3,400 seeds/oz.