How to Prune penstemon 'Melting Candy'?
Deadhead after flowering to maintain vigour and prolong flowering, then cut back to 15cm in winter

penstemon 'Melting Candy' · Penstemon 'Melting Candy'
Penstemon cultivation in fertile, well-drained soil in full sun or partial shade. In cold areas, protect plant overwinter with a dry winter mulch
Deadhead after flowering to maintain vigour and prolong flowering, then cut back to 15cm in winter