My new Hydrangea has arrived as you can see from the photos. It looks a healthy plant, with big glossy green leaves and a substantial stem, all of which bodes well. I was going to put it into a tub, but decided to pot it on into a larger plant pot first, to give it a chance to get used to the conditions for a week or two, and to start rooting into the new compost.
The size of the leaves indicates it will grow into a big plant, but I'll worry about that as and when it happens. I shall keep a photographic record of its progress and post the photos now and again so that you can see how it develops (and whether it flowers, probably not before September). I really enjoy getting new plants for the garden.