Early Sunrise Coreopsis
Coreopsis grandiflora. AAS and Fleuroselect Gold Medal winner. Dwarf, compact plants require little care and bloom all summer. Brilliant 2.5" semi-double rich golden-yellow blooms. Sow directly outdoors or indoors for transplants. Start seed indoors 6-8 weeks before planting out. Height 24-26". Prefers full sun. Approximately 50 seeds/pkg.
Start inside 6-8 weeks before last frost. Sow on surface, provide light and cool to warm temperatures (13-21°C). May also be direct seeded into the garden after last frost. Keep moist.
Transplant into the garden after last frost into a full sun to light shade location, 12" apart. Masses of flowers are produced for long periods, especially if plants are consistently deadheaded. These drought-tolerant perennials offer up cheerful blooms excellent for cutting and are of easy culture. Water during drought, but Coreopsis is quite drought-tolerant once established. Daily deadheading, while onerous, will reward the gardener with almost continuous bloom. To achieve an attractive plant and possible rebloom in autumn, shear plants back by a few inches as flowering slows down in late July. Do not prune back all the way for the winter, as stems left standing will protect the crowns.
Divide plants every three years in spring or early fall to maintain vigour. Simply dig a wide, shallow hole and set the spidery thing inside horizontally, covering with an inch of soil. Gravity will prevail, and the plant will send roots down and shoots up.
Healthy, vigorous plants under good culture are rarely bothered by insects; wash off light infestations of aphids with a forceful water spray. Diseases are also rare, especially in well-drained soils. If soils are too wet, the crowns may rot.