How to Prune Paeonia lactiflora 'Immaculée'?
Remove spent flowers and cut back foliage in autumn when it dies back

Paeonia lactiflora 'Immaculée' · Paeonia lactiflora 'Immaculée'
Will grow well in fertile, humus-rich, moist but well-drained soil in full sun or partial shade in a sheltered position. See herbaceous peony cultivation for more details.
Remove spent flowers and cut back foliage in autumn when it dies back