Irises are one of the easiest and most attractive marginal pond plants.
There are many named forms and they come in all shades and mixes of blue, purple and white, including double-flowered varieties. Some of the most dramatic are the modern Japanese hybrids that have extremely complicated markings. They tend to be very vigorous and are easy to propagate by division early in the spring, rather than the more usual August. Iris sibirica All forms of Iris sibirica love the moist soil beside a pond. The familiar yellow flag iris of the wild water meadows, I. pseudacorus is much too vigorous for most gardens.