How to Prune primula 'John Fielding'?
No pruning required

primula 'John Fielding' · Primula 'John Fielding'
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
No pruning required