This description is for Delphinium grandiflorum: Extremely aptly named, the Delphinium Blue Butterfly fills your garden with a rare shade of blue blooms that really do represent the insect from which they take their name. Delphinium grandiflorum is easy to grow and is a low maintenance plant. Looks fabulous in beds and borders, and is often used in flower arrangements. It enjoys a partial shade or full sun position, and is hardy enough to cope with inclement weather. Be aware that all parts of this plant are toxic if ingested.