I would like to keep my carnations till next year , they are in hanging baskets with some annuals I will have to take them out what size pot and do I put them in greenhouse and do I cut them back .
Most carnations are hardy over winter, but a small handful are frost tender, and will need to go into a greenhouse or a warm wall with fleece or straw over the top if going into minus temperatures.
There is no need to cut them down. They are usually short-lived, so might be a good idea to divide them up ready for next year or make some cuttings now. Put them into pots ready for next year.
Thanks for advice .