Coreopsis Flower Spread. Across 2-5 cm from mid summer to early fall - if spent flowers are deadheaded. This will also stimulate more flowering.
Floating 12 to 24 inches above dense deep-green basal foliage on wiry stems coreopsis requires full sun and well-drained soil. As plants mature expect them to spread from 18 to 24 inches wide. PruningGrooming Coreopsis Coreopsis are quite self-reliant needing very little attention.
Petal blight is more prevalent in varieties with double blooms.
Species plants can spread somewhat aggressively in the garden by both rhizomes and self-seeding. Petal blight is more prevalent in varieties with double blooms. 28052021 An annual C. Across 2-5 cm from mid summer to early fall - if spent flowers are deadheaded.