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Hydrangea 'Heinrich Seidel(Matthes, 1929)' is a classic mop head that starts periwinkle blue for us, darkening to lavender blue as the flowers age. The shrub is nice and compact with leaves somewhat smaller than many. The individual florets are large, completely filling the 6-inch heads.
Early summer to midsummer. 4-5 ft. x 4-5 ft.
Blue flowers
Part Shade Zones 5, 6, 7, 8, 9 |