- You Will Get 200 Seeds Of Tall Pink Cosmos Bipinnatus Flower Seeds. - Description: - Name: Tall Pink Cosmos. - Scientific Name: Cosmos Bipinnatus. - Color: Pink. - Plant Seeds: Outdoors After Frost / Indoors Weeks Before Last Frost. - Plant Height: 36 - 72". - Plant Spacing: 15 - 18". - Bloom Time: Summer – Fall. - Hardiness Zone: N/A (But Reseeds Itself Easily, So It Acts Like A Perennial In All Zones). - Light Requirements: Sun - Part Shade. - Soil & Water Preferences: Average – Dry.