How to Fertilize peony 'Roselette'?
Peony balanced feed twice yearly spring and post bloom

peony 'Roselette' · Paeonia 'Roselette'
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.
Peony balanced feed twice yearly spring and post bloom