Spotted Bellflower- campanula punctata
Hi! Just joined! I have Spotted Bellflower- campanula punctata 'Cherry Bells' which is invasive, though it's pretty. It is spreading into areas I don't want so I would like to dig it up and put it in a pot in the ground so it will stay in one place. Does anyone know how deep the roots go? Has anyone potted it up with success? If I pot it into a 12" deep pot will the roots grow down and out of the bottom drainage holes, making this pointless? Should I find a pot that is 15-18-20" deep?
Thanks for all of your help!