How to Prune montbretia 'Orange Devil'?
No pruning required, except removal of dead leaves and flower stems before new growth starts in spring

montbretia 'Orange Devil' · Crocosmia 'Orange Devil'
Plant 8-10cm deep in fertile, humus-rich, moist but well-drained and preferably sandy soil in full sun or partial shade; in colder areas plant somewhere with shelter from cold drying winds, such as near a wall, and protect in winter with a thick, dry, organic mulch. If clumps become congested, divide them in early spring. Has the potential to become a nuisance in some gardens if not managed well
No pruning required, except removal of dead leaves and flower stems before new growth starts in spring