How to Fertilize Penstemon Rock Candy Ruby ('Novapenrub')?
Weak flowering feed every four weeks spring to fall bloom

Penstemon Rock Candy Ruby ('Novapenrub') · Penstemon Rock Candy Ruby ('Novapenrub')
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 advice
Weak flowering feed every four weeks spring to fall bloom