Steve? Turn on your Houzz email: Up in the upper right corner, click on "Your Houzz", then on edit profile, go to advanced settings and scroll way, way down to where it says "who can email me" and change it to "allow anyone to email me". Hope this helps.

Both are about the same height, though I believe the Canturburry Bells can get larger. C. medium (Canturburry Bells) are biannual while Campanula persicifolia (Peach-Leaf-Bellflower) is perennial. I tried CBells many years ago. I gave up after four plants died out. They seem to rot out readily, so it is not a bad idea to treat them like annuals. It needs fairly moist, good draining soil.They are beautiful plants though, and the dark purple ones are amazing. But there are just too many other wonderful, and not fussy, Campanulas out there to plant this one. Campanula persicifolia is a great plant. Stays upright and is somewhat drought tolerant, though it does great in moist soils. I have my 'Alba' in an area where nothing else will grow due to tree roots. The Bellflowers are shallow rooted enough not to care about this. This year I tried an experiment. I left the stalks of some (after flowering) and it turns out they will bloom again on those same stems without deadheading. Reseeds readily, but are easy to pull up. Transplant well. The double forms are sterile. Hope this has helped you some. CMK

It's hardly invasive. It will spread, but slowly, and is easily removed. A wonderful and beautiful plant. In hot areas plant in filtered light or where it has some shade from midsummmer or afternoon sun. Can be easily transplanted to other areas with plugs. RB

Thanks very much, all of you. I appreciate the advice about digging wide and deep, and not just yanking the roots as it's clear from what you've said I will only get replication of the plant. It sounds like it's going to be quite a job because it is next to a dry-laid stone retaining wall. I will be sure to bag every scrap of plant material and dispose of it in the trash. I have already enough invasive thug plants -- lady bells (adenophera), Cyprus spurge, self-heal, and a neighbor's Japanese knotweed.