Delphinium Pacific Hybrids keeping in winter

Delphinium Pacific Hybrids

I have a garden that is on the north side of the house in Derbyshire and in winter it does not have any sun light. We managed to get two of the delphiniums grown last year and kept in pots over the winter in the greenhouse to flower, can I dig them up in autumn put them back into pots in the greenhouse until next year. It did save them from the snails and slugs early this year.