What's your question? Ask

If a cutting from the plant produced blooms in another location, then the location is the issue. Judging from your comment that the leaves look beautiful, there is probably too much nitrogen in the soil where it is located. This causes lush foliage growth and no blossoms. Have the soil tested and start to use a phosphorous rich fertilizer for a few months.

This article will help you: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/hydrangea-propagation.htm

At full maturity it gets to be about 6 feet wide, but that being said, hydrangeas are not usually rapid growers. You can prune it back to keep it smaller.

They need about 2 inches of water a week, either from rainfall or the hose. As far as where they thrive, that depends on what variety you plan on growing. If you tell us the variety, we can tell you how cold tolerant it is.

I suspect that either the aluminum in the soil is getting low or the pH in the soil is going up and they are beginning to fade into the pink side. This article will help you regain their color: https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/change-hydrangea-color.htm

This article will help you:
https://www.gardeningknowhow.com/ornamental/shrubs/hydrangea/prune-hydrangea-bushes-hydrangea-pruning-instructions.htm