Bigleaf and oakleaf hydrangeas bloom on last-year’s growth or old wood, and the flower buds are exposed to temperature extremes all winter. It is important to know which type of hydrangea you ...

quercifolia (oakleaf hydrangea) and, H. arborescens (smooth or wild hydrangea ... Oakleafs' deeply-lobed leaves offer spectacular fall color well into winter. Concluding a five-year study of native ...