Plant Cutleaf Coneflower in well-drained soil with full sun to partial shade. Water regularly, especially during dry spells, but avoid waterlogging. Deadhead spent blooms to encourage more flowers and prevent self-seeding. Divide clumps every few years in early spring to maintain vigor. Protect from strong winds, as tall stems may require staking. Fertilize lightly in spring with a balanced fertilizer. Keep an eye out for powdery mildew and treat promptly if needed.