How to Fertilize peony 'Bartzella'?
Feed in spring and lightly after flowering

peony 'Bartzella' · Paeonia 'Bartzella'
Best in a deep, fertile, humus-rich soil that is moist but well-drained in a sheltered position in full sun or partial shade. Should not need support. Long-lived but resents disturbance. See herbaceous peony cultivation for further information.
Feed in spring and lightly after flowering