The Right Place - Plant Cosmos in full sun. Any average soil that drains well and is slightly acidic is fine. Cosmos accept sandy soil.
Start From Seed - Cosmos are easy to grow from seed, either indoors under lights or outdoors in the garden. If direct seeding is your choice for Cosmos, sow seeds indoors about 4 weeks before last frost, or directly into the garden bed after all danger of spring frost is past. For details about starting seeds indoors and out, see Starting Plants From Seed and check out Seed Starting Equipment and Supplies in Yardener’s Tool Shed.
Planting Seedlings - Dig holes large enough to accommodate the root systems of transplants and set them so that the tops of soilballs are slightly deeper than the surround ground. New roots can form from the lower part of the stem which also help support leggy plants. Space plants about 1 foot apart. For planting tools see Hand Tools For Digging and Planting in Yardener’s Tool Shed.
