How to Prune Paeonia obovata subsp. willmottiae?
Cut back to ground level in autumn, to remove dead foliage and reduce the risk of disease

Paeonia obovata subsp. willmottiae · Paeonia obovata subsp. willmottiae
Grow in deep, rich, well-drained soil, ideally in full sun but will tolerate light shade. Will not tolerate waterlogging. See herbaceous peony cultivation for more detailed advice
Cut back to ground level in autumn, to remove dead foliage and reduce the risk of disease