From the sources "Hydrangeas for American Gardens," by Michael A. Dirr (2004), and "Encyclopedia of Hydrangeas" C.J. and D.M. Van Geldere...Read Moren (2004 - Timber Press):
These two sources disagree on the height of this shrub, one calling it 3.5' - 5' and the other saying 4'-6'. They do agree that the flowerheads are large and pure white. Sepals are sharply serrate. Single florets have a small blue eye. The plant needs some shade for good results. The flowers become green tinted with red when ready to dry and are delicate. This is not a cold hardy plant but no zone reference was given.
From the sources "Hydrangeas for American Gardens," by Michael A. Dirr (2004), and "Encyclopedia of Hydrangeas" C.J. and D.M. Van Geldere...Read More