How to Prune sweet pea 'William Willson'?
Deadhead regularly and cut back after flowering

sweet pea 'William Willson' · Lathyrus odoratus 'William Willson'
Grow in humus-rich, fertile, well-drained soil in full sun or light dappled shade. Incorporate well-rotted organic manure before planting and apply a balanced liquid fertilizer every two weeks when in growth. Deadhead regularly to prolong flowering. See sweetpea cultivation for further information
Deadhead regularly and cut back after flowering