'Gloria' Cosmos Seeds. A showy pink variety of Cosmos, “Gloria” is a looker for sure. Standing up to 5′ tall, with large 4″ blooms in a deep pink color. An excellent choice for late-season color as other flowers die down. You can plant Cosmos just about anywhere, in just about any conditions. They are basically care-free, and one of the easiest flowers to grow from seeds. Cosmos will readily self-seed, so make sure to cut back early if you don’t want them to spread. 1 g. seed packet Name: Cosmos ‘Gloria’ Botanical Name: Cosmos bipinnatus Life Cycle: Annual (will self-seed freely) Color: Deep pink with dark pink/purple center Bloom Season: Summer / Fall Height: 36-60″ Light Requirement: Sun Planting Instructions: Scatter Cosmos seeds outdoors after danger of frost has passed. Seeds can be covered ¼” since they do not need light to germinate. Germination will usually occur in just 3 to 5 days, but it can take up to 2 weeks. Keep soil damp, but not soggy.