Pruning Lungwort 'Blue Ensign'

Pulmonaria 'Blue Ensign' doesn't require traditional pruning, but it benefits from tidying to keep it looking fresh and to encourage healthy new growth. The main task is removing old foliage in June or July, after flowering has finished in spring. By early summer, the original leaves—which emerged with or just after the blue flowers—often look tired, mildewed, or tatty. Cut back all the old foliage to ground level using secateurs or garden shears. This might seem drastic, but the plant responds by producing a flush of fresh, spotted leaves that remain attractive through summer and autumn. If you leave the old foliage in place, powdery mildew can spread and the clump looks shabby. Deadheading spent flower stems isn't essential but tidies the appearance and prevents the plant wasting energy on seed production. Snip off faded flower stalks at the base once blooms have browned. In late winter or very early spring—before new growth begins—you can also remove any remaining dead or damaged leaves left from winter. This isn't strictly necessary, as fresh foliage will soon cover it, but some gardeners prefer a clean start. No other pruning is needed. Pulmonaria doesn't become woody or overgrown, and cutting back hard in June is sufficient to maintain a compact, healthy clump. Avoid autumn pruning, as the fresh summer leaves provide some winter interest and protection for the crown. Use clean, sharp tools to reduce disease risk, especially if mildew has been present.