Iris pseudacorus is part of the Iridaceae family of plants. This plant is native to Europe, Western Asia, and Northwest Africa. Iris pseudacorus is also known as Yellow Flag, Water Flag, Yellow Iris, Daggers, Flagon, Jacob’s Sword, Water Skeg, Yellow Fleur-de-lis. It is a herbaceous perennial plant that prefers wet conditions as it is usually found in wetlands. Iris pseudacorus propagates through rhizomes as well as seed and establishes itself. It flowers in the summer, flowers are yellow with 3 large fall petals and 3 erect ones. Its Latin name pseudacorus means false Acorus which is another plant, leaves are very similar however not related at all. Yellow Flag Iris grows to about 1.5m or 5ft. After flowering, it produces pods containing brown seeds. The flower is attractive to bees.
Plant Iris pseudacorus in the sun or partial shade in wet humus-rich soil that is acidic. It is perfect in any aquatic landscape. But it also tolerates dryness as well. Propagate by division after flowering in summer or in autumn. No pruning necessary except dying foliage or spent flower stems. Watch out for snails, slugs, or thrips as well as aphid borne viruses, bacterial rot or Botrytis.
Iris pseudacorus plant is used for water treatment as it absorbs heavy metals.