Cup & Saucer Mixed Canterbury Bells Seeds. Cup and Saucer Mixed provides colourful plants for rockeries or perennial borders in full sun or light shade. Bell shaped flowers with a flat base ring forth from strong flowering stems in a myriad of colours including white, pink, deep blue and rose. Garden height is 75 cm (30"). Canterbury Bells are biennals, which means they grow from seed through the first season, overwinter as a plant then flower the second season before going to seed and dying. We recommend sowing seed in tow consecutive years to ensure yearly flowering.