They will grow in the same place for many years. Delphiniums provide a variety of colors over long periods in the summer. They need well-drained soil and sunny locations for best results. They grow 18 to 60 inches high, and can be used for the border, for background plantings, or for cut flowers. The plants will rebloom if the old flowers are removed.
Propagation is by seed or cuttings.
Plant seed any time from spring to September in a sunny, well-drained spot. Seed germinates in about 20 days. Take cuttings in the spring. Species and varieties of this group are useful for the border, rock garden, and for edging. They are also used as cut flowers.