We had a freeze after my bush was almost budding. Most leaves are wilted, brown and looking dead. Is there anything I can do? They are affected all the way down the stems.
You should do nothing to your hydrangeas until the growing season is in full swing and your shrubs have shown considerable growth. They could still bloom and you don't want to interfere with that. During early summer you can better assess the extent of the damage to your shrubs and prune the dead branches back. Whether you have Hydrangea macrophylla, paniculata, querquefolia, or arborescens the advice would be the same.