The flowers are fading, aren't they, that's all. I must sayit looks as though its suffered a little bit of drought here and there (brown tips on a couple of leaves) or possibly hot bright sun, but otherwise, leave it alone and let it go through the winter - prune in April when growth begins, cutting off the spent flowerheads and any dead bits of stem.

This looks about normal to me for the time of year. The flowers fade, the leaves fade and fall and it rests for the winter. Try to resist pruning at all ( even the flowerheads just now) even in spring because you will prune off the flowering shoots. It will surprise you with new vigour next year. Meanwhile make sure it doesn't dry out and all should be well. I have learned over time to leave them to do their own thing!

I always give my hydrangeas a good general feed plus a mulch of garden compost each spring which they appreciate. As well as giving them a kick start, this seals in moisture and keeps the roots cool