Iris versicolor, commonly known as Blue Flag Iris, is a beautiful marginal pond plant that produces elegant blue-violet flowers with yellow and white markings in late spring and early summer. The striking blooms rise above upright green foliage, bringing colour and height to the edges of ponds and water features.
This hardy aquatic plant thrives in shallow water or consistently damp soil and is well suited to planting in pond margins, streams, and bog gardens. Its strong vertical leaves provide structure throughout the growing season, while the flowers attract bees and other pollinating insects.
Iris versicolor works particularly well in naturalistic pond planting schemes and wildlife ponds, helping to soften the edges of the water while adding seasonal interest.
Planting depth: 0–15cm of water above the basket
Position: Full sun to partial shade
Height: 60–90cm
Spread: 45–60cm
Growth rate: Moderate
Hardiness: Fully hardy in the UK
A reliable marginal plant that adds vibrant colour, structure, and wildlife interest to pond margins and water gardens.