The Chocolate Cosmos
Plant tubers 6 inches deep and 12 inches apart. Well-drained, medium textured, moisture-retentive soil is best. Requires full sun.
Mulch deeply in winter where plant is hardy. Growth starts late in spring when soil has had time to warm up. May have to stake if plant becomes too full. Where not hardy, dig tubers before first frost and store in a cool, dry frost-free location in dry potting soil or dry peat moss. Wait until the last frost date has passed before planting outdoors again.
Zones 7-10, or warm Zone 6