How to prune comfrey

After flowering in early summer; repeated harvests every 4–6 weeks through the growing season. Stop by early September.. Cut all stems back to 5–10 cm above the ground using shears or a sickle — wear gloves as the bristly stems irritate skin. For leaf harvest, cut individual large leaves or all stems to just above the crown. Do not compost if cutting after seed set.

3–5 cuts per growing season; one main post-flower cutback plus repeat harvest trims. Comfrey grows vigorously and can be cut back multiple times each season — both for garden tidiness and to harvest leaves for liquid feed or mulch. Cut the whole plant back to about 5–10 cm above the ground after flowering to stop it self-seeding and to encourage fresh leafy growth. Harvest leaves every 4–6 weeks through the growing season. Stop cutting by early September so the plant can recover before winter.

Cut all stems back to 5–10 cm above the ground using shears or a sickle — wear gloves as the bristly stems irritate skin. For leaf harvest, cut individual large leaves or all stems to just above the crown. Do not compost if cutting after seed set.