Hydrangea macrophylla subsp. serrata 'SMHSMAKF2MT' The 'Seaside Serenade Cape May' hydrangea is a cultivar of Hydrangea macrophylla. It's a part of the Seaside Serenade series, which features compact and reblooming hydrangeas with strong stems. The 'Cape May' cultivar produces mophead flowers that change from pink to blue depending on the acidity of the soil. The foliage is dark green and glossy, providing an attractive backdrop for the colorful blooms. It prefers partial shade and moist, well-drained soil.