Overwintering Gaillardia & Dahlia in containers
First foray into both these plants this year (both of which we have enjoyed immensely) and we previously just left everything in the pot outside in the hope that it will pop out again in spring (with mixed results as you can imagine!). However I want to take care of these so would I be right in thinking I would be better off cutting them back fully after a decent hard frost and then moving the containers into either a small greenhouse (which could be heated) or an unheated garage? If so which would be best? Thanks in advance!