Buy White Dome® Hydrangeaonline. White Dome® is a hardy, strong growing hydrangea that rewards gardeners with clouds of big, lacy white blooms. The dome shaped flowers are 6 to 10 inches in size and seem to float about the plant. The flowers are held up by sturdy stems that don't droop, even after a heavy rain. This sturdy variety won't flop over like 'Annabelle' and so maintains a tidy appearance throughout the season. WHITE DOME® is useful as a mass planting or incorporated into a woodland setting. It's a great alternative to ornamental grasses to add winter interest to a landscape. Largely trouble-free, it has few pests or diseases. It is a hardy hydrangea that blooms on new wood, so even if killed to the ground by extreme weather it will still produce summer flowers and blooms are not affected by pH. The blooms are extremely attractive both in the landscape and as a cut flower. White Dome's sturdy stems make it a durable choice for both fresh and dried arrangements.