Penstemon heterophyllus 'Züriblau'

Grow in fertile, well-drained soil in full sun or partial shade. In cold areas, protect plant over winter with a dry mulch. See penstemon cultivation

Regular deadheading can encourage a longer flowering season. In autumn, cut back to by about a third to tidy and reduce windrock, but leave enough to protect the crown over winter. In mid- to late spring cut back to lowest new shoots

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

May be susceptible to aphids and chrysanthemum eelworm

May be susceptible to Powdery mildews