contrasting colours of the flowers, the blue and the white.(white ones are peach leaved Bellflowers). The blue flowers might be a type of perennial Lobelia that the hummingbirds are supposed to like, but so far, haven't seen any interest in it. Will check and update if this is incorrect plantname.(if the tag is still there :) we got several new perennials this spring, and have got some of the names confused.