Where To Plant: Plant them in full sun. Plants grown in part sun will flower, but may more prone to blowing over in the wind due to weaker stems.
When To Plant: Direct sow cosmos seeds in spring around the last frost date for your area. . Even if the soil isn’t warm enough for seed germination, cosmos seed will wait for the ideal conditions to grow. Don’t pamper the seedbed
How To Plant: Grow annuals from seed only. Sow outdoors 1/8 inch deep after last frost or indoors 4-5 weeks before last frost. Seeds will germinate in 3-10 days.Cosmos plants are not heavy feeders. Too much fertilizer will cause plants to produce excessive leaf growth at the expense of flower production.
Added Benefits: Growing cosmos adds beauty to summer gardens, especially when planted in informal beds or used in mixed borders. Flowers come in striking reds and oranges or paler crimsons and cream.
Tips: Plant cosmos as a border around vegetable gardens to attract beneficial insects, bees and butterflies.