How to Fertilize penstemon 'Blackbird'?
Balanced perennial feed every four weeks spring through summer growth
penstemon 'Blackbird' · Fertilizing
penstemon 'Blackbird' · Penstemon 'Blackbird'
Grow in fertile, well-drained soil in full sun or partial shade. In cold areas, protect plant overwinter with a dry winter mulch
Watering: Moderate regular watering, avoid prolonged drought and stagnant waterloggingSunlight: Full sun · Partial shadeInformation to be completed