How to Fertilize hydrangea [Charm]?
Hydrangea shrub feed every four weeks spring through early summer
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hydrangea [Charm] · Hydrangea macrophylla Charm ('Hbachar')
Grow in moist but well-drained, humus rich soil, ideally in light shade, though will tolerate full sun if soil is not too dry. Mulch in spring. Soil additives may be required to maintain specific flower colours. See shrubby hydrangea cultivation for more detailed advice
Hydrangea shrub feed every four weeks spring through early summer