Delphiniums are herbaceous perennial flowers—meaning that they die back every fall and winter, but their roots remain alive and regrow the plant every spring and summer. Taller varieties of delphiniums can grow up to eight feet tall and can add a beautiful vertical layer of vibrant color to your summer garden.

Sunlight: Delphinium requires full sun to part shade. It needs a minimum of six hours of sun a day. In hot climates, it benefits from afternoon shade. Soil: Delphinium prefers well-draining soil that is rich in organic matter.

Positioning — all delphiniums need full sun to perform well. Tall perennial types also need a sheltered spot, out of strong winds. They are usually best at the back of borders or grouped with other large plants such as ornamental grasses.

Delphiniums spread rapidly and do not like crowding, so choose a container large enough to hold a plant at least twice the size with plenty of drainage holes. Avoid materials like clay or terracotta that dry out quickly.