Double Delights™ wedding gown hydrangea (Hydrangea macrophylla 'Dancing Snow') blooms in clear, white double florets atop a mop-head type hydrangea. Root hardy in the Chicago area, this hydrangea prefers partial shade and well-drained—yet consistently moist—soil. This cultivar is one of the new introductions bred to flower on current season's growth, which enables flowering even when the top growth has been killed to the ground during the winter.