Hydrangea macrophylla is a big leaf hydrangea. The big leaf hydrangeas blooms are produced on old wood therefore should be pruned in summer after plants finish blooming and strong new shoots have developed from the base.
Depending on your soil Ph, your blooms will turn either pink (alkline) or blue (acidic). To change blooms to blue add aluminum sulfate or add lime to change blooms to pink. This should be done late fall or early Spring. Dead head spent flowers to promote more blooms. Make sure to prune out weak or damaged stems immediately.

Garden Style:
Cottage, Courtyard, Formal
Other Uses:
Hedges, Flowerbeds, Borders, Screens, Cut Flowers, Dried flowers, Easy Care, Gift Plant