How to prune arisaema speciosum

Post-flowering for deadheading; autumn for cutting back dormant foliage. Cut the spent flower stalk to soil level. To limit self-seeding remove the berry cluster before it ripens. In autumn, once leaves are fully yellow, cut stems cleanly at ground level.

Once per growing season. Arisaema speciosum needs little pruning beyond deadheading the spent spathe. Remove the flower stem at the base after the bloom fades. If berries form and you want to prevent self-seeding, remove the berry cluster. Let all foliage die back naturally in autumn before cutting stems to the ground.

Cut the spent flower stalk to soil level. To limit self-seeding remove the berry cluster before it ripens. In autumn, once leaves are fully yellow, cut stems cleanly at ground level.