How to Prune sweet pea 'First Flame'?
No pruning needed but deadhead as soon as flowers fade

sweet pea 'First Flame' · Lathyrus odoratus 'First Flame'
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
No pruning needed but deadhead as soon as flowers fade