How to Propagate primrose 'Iris Mainwaring'?
Propagate by division in autumn or early spring

primrose 'Iris Mainwaring' · Primula 'Iris Mainwaring'
Grow in full sun or partial shade in moderately fertile, moist but well-drained, humus-rich-soil. May also be grown under glass in an alpine house or cold frame in a mix of equal parts loam-based potting compost, leaf mould or peat, and grit
Propagate by division in autumn or early spring