Delphinium 39pacific giants mixed39 is a tall garden border plant that has spectacular columns of semi45double blooms in a variety of pinks whites purples and blues they give height and structure to borders and are perfect for planting behind lower flowering perennials such as lavender delphiniums sometimes known as larkspurs are a traditional cottage garden plant that flowers in june and july and like sunny positions this type of delphinium as the name suggests is a large va