Hydrangeas can be damaged by frost on their new growth. The leaves that are damaged will stay that way as they enlarge but the next lot should be fine. In extreme cases the shoot tips are killed and the plant has to re-sprout from lower down. The weather has been cold but now seems to be warming up. Plants are catching up!

thank you volunteer, the underneath does seem ok and it is mainly the top leaves that have curled up and gone limp.i would hate to lose it as its quite large and was full of flowers last year.

We had a guest from Germany staying with us once and she was amazed at all our hydrangeas growing in the ground. Where she lived they were "tub plants" and had to come into cover for the winter. So they are only relatively hardy.