Bigleaf hydrangea Hydrangea macrophylla Pink - Hardy plantA captivating and colourful bush you can enjoy for months! The pink flowers of the hydrangea (Hydrangea macrophylla) will brighten up any garden or balcony. The flowers bloom from summer to autumn. Pruning is not necessary, unless the bush becomes too large. Plant the hydrangea in partial shade. The soil should be kept damp. Give it extra water during dry periods.