How to Propagate penstemon 'Precious Gem'?
Propagate by softwood cuttings in early summer or semi-hardwood cuttings in midsummer

penstemon 'Precious Gem' · Penstemon 'Precious Gem'
Penstemon cultivation in fertile, well-drained soil in full sun or partial shade. In cold areas, protect plant overwinter with a dry winter mulch
Propagate by softwood cuttings in early summer or semi-hardwood cuttings in midsummer