Thank you for those beautiful photos.

Hydrangeas are among the first flowers I remember from my childhood in Tennessee. We had a pink Sarah Bernhardt peony next to the front porch and a blue hydrangea on the north side of the house. There's nothing like the scent and feeling of burying your face in the cool petals of peony and hydrangea blooms...
I live in Mississippi now and have tried for years to grow them in this hard-pan clay soil with no success. Finally, three years ago, I double-dug a flowerbed near the front porch, added topsoil, leaves, and compost, and planted three hydrangeas, one of them a French lace-cap under the drip line of the house. The French lace-cap bloomed two years ago and again last year. One of the blue ones had two decent sized blooms on it last year. So far, the third one hasn't done anything... This year, they are all as high as my head and just the other day, I noticed blooms budding out on two of them... So who knows...?
Maybe I should think about planting some peonies now...