H. involucrata Blue Bunny' aka H. involucrata Wim Rutten'
Have anyone seen or grow it?
Quote from the Spring Meadow site,
(H. involucrata ÂWim Rutten')
Blue Bunny Hydrangea is a drift of blue flowers from mid-summer until fall. Developed the late Wim Rutten of the Netherlands, this plant is as special as the man. It forms its flower buds on new wood and thus blooms reliably every year. You will love that Blue Bunny is a strong growing plant that produces an abundance of blooms. The propagation of, and or the sale of plant parts is prohibited without a license. Patent/trademark tag required.
Zone 6, 2-4 feet, gr 1, Full Sun Partial Shade
That part about NEW WOOD caught my eyes and made me very-very curious, but words 'strong grower....2-4 feet' made me laugh. :-)
Here is a link that might be useful: Blue Bunny