Bellflower Plantsnn Campanula is a group of over 300 annual, biennial and perennial plants that span several sizes and colors.Jun 18, 2021 Does bellflower like sun or shade? Will iris come back every year? What flower seeds come back every year? Do cosmos flowers come back every year? Does mums flowers come back every year? Does celery come back every year? Does celery grow back every year? Do perennials come back each year? Does Gaillardia come back every year? Does thyme come back every year? Does sage come back every year? Do hosta come back every year? Do mums come back every year in pots? Does headless come back every year? Do hibiscus come back every year? Do annual seeds come back every year? Do dianthus come back every year? Do cannas come back every year? Is bellflower easy to grow? Does bellflower like sun or shade? Bellflower Growing