I have a large hydrangea in a pot and want to plant it in the garden. When is the best time to move it? Can I do it now or should I wait till Feb/March time?
keep it (including the pot) protected from the worst of the weather and plant it in march.... if you have a sheltered spot you can plunge it pot as well into the soil as it will be better protected that way
The old flowers will give it some frost protection so don`t prune until frosts are no longer expected in your part of the UK, then prune out old growth.