How to Fertilize penstemon 'Geoff Hamilton'?
Balanced perennial feed every four weeks from spring through summer
penstemon 'Geoff Hamilton' · Penstemon 'Geoff Hamilton'
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 further information
Balanced perennial feed every four weeks from spring through summer