Yellow Flag Iris
Iris pseudacorus
Family: IridaceaeNative: Europe, western Asia, and northwest AfricaIdentified: Apr 6, 2026
A herbaceous perennial plant that typically grows to 1–1.5 m tall. It features sword-shaped, grey-green leaves and bright yellow flowers with three drooping sepals and three smaller upright petals.
Learn more about Yellow Flag Iris in the encyclopedia →Care instructions
This plant thrives in full sun to partial shade and requires very wet conditions, often growing in standing water of 20-30cm. It is hardy and can tolerate a wide pH range, but it should be contained as it is highly invasive in many regions.