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

Hydrangea involucrata · Hydrangea involucrata
Grow in moist but well-drained, humus rich soil, in sun or part-day shade. Mulch in spring, and provide shelter from cold, drying winds. See shrubby hydrangea cultivation for more detailed advice
Hydrangea shrub feed every four weeks spring through early summer