We always have a great display of a potted Garden Mum, or hardy Chrysanthemum if you prefer. This year was no exception, and come mid October this was the display from a small pot, that we’d overwintered from last year outside.
We just planted 4 plants into a 12″ pot, keep well watered and fed. They do dry out easily and wilt, so I would use quite a deep pot if possible with a tray on the bottom to hold the water. Once flowered, we cut the stems back to a few inches above soil level and leave outside for the winter. The one’s we’ve grown only seem to last a few years before rot sets in, so plan accordingly.