How to prune yarrow

Deadhead throughout summer; cut back fully in autumn or early spring. Cut faded flower stems back to just above the basal foliage clump. In late autumn, shear all stems to within a few inches of the ground. To divide, lift clumps in spring, split into vigorous sections, and replant immediately.

Deadhead as needed in summer; annual cutback in autumn or spring. Yarrow is a tough, spreading perennial. Deadhead spent flower heads to promote repeat blooming through summer and early autumn. Cut the entire plant back to basal foliage in late autumn or early spring. Divide congested clumps every 2–3 years to keep plants vigorous. Minimal effort, reliable rewards.

Cut faded flower stems back to just above the basal foliage clump. In late autumn, shear all stems to within a few inches of the ground. To divide, lift clumps in spring, split into vigorous sections, and replant immediately.