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The large heads of Hydrangea 'Merveille'(Cayeux, 1927) are composed of mid-sized flowers which begin a rich sky blue and turn cobalt blue as they age. There is something a little wild and undisciplined about this shrub. That is perhaps its charm. Repeat bloomer.
Early summer to midsummer. 4 ft. x 5 ft.
Blue flowers
Part Shade Zones 5, 6, 7, 8, 9 |