Pathetic blooms

Question

I have a climbing hydrangea planted on a fence and although the leaves are plentiful and very healthy, the flower heads develop a pathetic ring of flowers all round the edge but nothing in the middle

• 

Answer 1

It is similar to the actual flower which resembles a lacecap hydrangeas flower.

This is a common and quite complex issue. Normally, with time it resolves itself, as it is usually due to young age of a plant. This article will offer more insight: https://www.gardeningknowhow.com/ornamental/vines/climbing-hydrangea/climbing-hydrangea-wont-bloom.htm