Cosmos Flower Spacing. 6068 slightly acidic Bloom Time. Cover seeds and water lightly.
This technique produces more Cosmos flowers. Both the perennial Cosmos atrosanguineus and the annual cosmos are upright plants making excellent additions to a summer border. Feb 20 2020 Cosmos Give cosmos flowers at least 7 inches 18 cm between plants.
Once in the ground cosmos will grow rapidly so be sure to stake them early while they are still young.
Space the seedlings about 30cm 1ft apart in good compost. Sulphureus 10-12 inches apart while the taller varieties C. Plant the shorter types C. Bipinatus prefer 1- 2 feet in between.