How to Fertilize Chinese quinine?
Hydrangea shrub feed every four weeks spring through early summer

Chinese quinine · Hydrangea febrifuga
Grow in any moist but well-drained soil in partial shade or grow in sun if soil remains reliably moist. Improve chalky soils with organic matter to support good growth. See shrubby hydrangea cultivation for further advice
Hydrangea shrub feed every four weeks spring through early summer