Delphinium's are an excellent perennial to give that extra height in a border. They have deeply lobed basal, green leaves with beautiful racemes of flowers from summer onwards. Once they have finished flowering they produce seeds which are often shiny and black. Delphiniums are perfect for attracting bumble bees and butterflies into the garden. They like to be planted in good soil and sun or semi shade. Once finished flowering trim flower heads to keep them looking tidy.