How to prune lupinus polyphyllus 'gallery blue'

Deadhead as spikes fade (late spring–summer); cut back in autumn or early spring. Remove spent flower spikes cleanly to a lateral bud or basal foliage. After the season, cut all growth to ground level and clear away dead stems.

Deadhead after each spike; full cut-back once annually. Deadhead spent spikes immediately after flowering to encourage a second flush of bloom from this compact dwarf lupin. Cut back to a lateral bud or the leafy base. After all flowering is complete, cut the plant down to the basal rosette. Remove all old growth in autumn or tidy in early spring.

Remove spent flower spikes cleanly to a lateral bud or basal foliage. After the season, cut all growth to ground level and clear away dead stems.