I'm glad you've brought up the subject of hygrangeas anniebach.
In response to your question, I think it depends on how big the hydrangea is, whether it will survive being potted and transplanted.
However my question is, why won't my hydrangea flower? It's in reasonably well-drained soil, gets sun for part of the day and I feed it with Miracid for acid-loving plants.... but not seen a flopwer ever. I think it was one that was given to me as a pot plant, and was probably forced, but it's been in the garden for at least 8 years and has never flowered