Native to Mexico and Central and South America. Cosmos is from a Greek word meaning beautiful and orderly. Sow seed 1/4 inch deep or set transplants in the garden after all danger of frost. Cosmos will grow in full sun. Space the plants 12 inches apart. Planting them this close to each other helps them to grow together and provide support. Cosmos will grow 3-4 feet high. Cosmos are easy to grow. They do well in dry weather. Do not overwater. Cosmos will reseed themselves. Butterflies like their flowers. They can be cut for flower arrangements. Leave the plants after a killing frost. Birds love their seeds.