Yellow Flag Iris - Iris pseudacorus
Yellow flag Iris bears large clumps of green leaves from which elegant yellow flowers appear in late spring. This iris is perfect wildlife gardens. Plant with other water loving plants for a naturalised look. Grow in full sun to part shade.
Do not plant this iris directly into the ground as it is very vigorous. It needs to be grown in a plastic pot that is placed into water. Also deadhead the flowers to prevent seeds from setting.