The listing, 20 Blue Canterbury Bell Seeds has ended.
The Canterbury bells plant is hardy throughout Zone 4-10. It thrives in full sun to partial shade and appreciates moist, well-draining soil and reasonably cool temperatures. Therefore, if you live in a relatively hot climate, you may want to provide plenty of afternoon shade.
Like most bellflower plants, Canterbury bells are easily propagated by seeds. These should be started in late spring/early summer, thinning as needed once seedlings become large enough. You need only minimal covering with soil. Simply sprinkle seeds in the garden bed and allow nature to do the rest (of course, you will need to keep the area watered).
Mature plants will self-seed readily, but just in case, you may want to keep some newly started plants in another nursery bed or pots for transplanting later, usually in spring.