How to prune elecampane

Deadhead after flowering in late summer; cut back fully in autumn after foliage dies down, or early spring. Snap or cut spent flower stems at the base once petals drop. In autumn, cut all stems to just above ground level with shears or loppers. Divide congested clumps every 3–4 years in spring.

Annually (autumn or spring cutback); deadhead as needed in summer. Elecampane is a tall, vigorous perennial herb that needs minimal pruning. Deadhead spent flower heads after late-summer bloom to prevent excessive self-seeding — this plant can spread aggressively. Cut stems down to ground level in autumn or early spring. Beyond that, little intervention is required.

Snap or cut spent flower stems at the base once petals drop. In autumn, cut all stems to just above ground level with shears or loppers. Divide congested clumps every 3–4 years in spring.