penstemon 'Delfts Blue Riding Hood'

Grow in fertile, well-drained soil in full sun or partial shade. In cold areas, protect plant overwinter with a dry winter mulch. See Penstemon cultivation for more details

Deadhead after flowering to maintain vigour. Prune back to base in spring

Propagate by softwood cuttings in early summer or semi-ripe cuttings in midsummer

May be attacked by slugs, snails and eelworms

May be subject to powdery mildews