penstemon 'Pensham Plum Dandy'

Grow in fertile, well-drained soil preferably in full sun. In cold areas, protect plants overwinter with a dry winter mulch

Deadhead after flowering to maintain vigour. In autumn, cut plants down to about a third of their height to prevent windrock but leave some protection from frosts; in late spring or early summer after new growth appears and after frosts are over, cut out old stems

Propagate by softwood or semi-ripe cuttings in early summer

Generally trouble-free, though may be attacked by slugs, snails and chrysanthemum eelworms

May be subject to a downy mildew