Hydrangeas are dense, deciduous bushes bearing very large flowers heads throughout summer. Flower heads are either ‘mophead’ with a large rounded flower cluster, or ‘lacecap’ with a center of smaller flowers surrounded by larger four petaled flowers. Flowers are either white, blue or pink, the colour depending on the soil type: pink on alkaline soil, blue on acid ones.
Most common varieties are hardy and are great for coastal gardens. They will grow well on any not too alkaline soil. Most prefer a situation in sun or part shade but some varieties prefer shade.