How to prune lupinus 'manhattan lights'

Deadhead throughout flowering; cut back in autumn or early spring. Cut faded spikes to the nearest lateral bud. After all flowering, cut back to the leafy rosette at the base. In autumn, remove all dead top growth at soil level.

Deadhead after each spike; full cut-back once annually. Deadheading spent spikes promptly after they fade promotes a second flush of the bicolour flowers. Cut back to the nearest lateral shoot or basal leaves. After all flowering is complete, reduce the plant to its basal rosette. Clear all top growth in autumn after frost or tidy in early spring before new growth begins.

Cut faded spikes to the nearest lateral bud. After all flowering, cut back to the leafy rosette at the base. In autumn, remove all dead top growth at soil level.