Direct sow in early spring after the danger of frost has passed. Plant in full sun, in well drained soils. NO NOT FERTILIZE. Rich, fertile soils produce unusually tall, lanky plants with few blooms. Plants become top heavy and fall over. Harvest bouquets in the early morning hours. Select stems with flowers that have just opened. Remove leaves below the water line. Cosmos has a vase life of 5-7 days. This species does not mind being crowded. No need to thin the stand.
Seedlings are not winter hardy.
Average Planting Success: 80%
Height: 12-16 inches
Germination: 7---21 days
Optimum Soil Temp. for Germination: 70°F--80°F
Sowing Depth: 1/16"
Blooming Period: May----November
Average Seeds Per Pound: 63,000
1 oz Covers: 182 sq.ft.
Seeding Rate: 15 lbs. per acre