Iris ensata 'Frosted Intrigue' is a Japanese water iris grown for its large, rich blue summer flowers. Each bloom reaches around 12–13cm (5 inches) across and shows deep blue petals with pale blue signals at the centre.

This clump-forming beardless iris suits damp borders and pond edges where the soil stays moist. It produces tall flowering stems that rise above upright, sword-shaped leaves, bringing height and colour to your garden in summer.

Key Features

• Botanical name: Iris ensata 'Frosted Intrigue'
• Common names: Japanese iris, Japanese water iris
• Plant type: Rhizomatous perennial
• Flower colour: Dark blue petals with pale blue signals
• Flower size: Around 12–13cm (5 inches) across
• Flowering period: Summer
• Foliage: Upright, narrow green leaves
• Position: Full sun or partial shade
• Soil: Moist, fertile soil
• Height: Up to 90cm
• Spread: Up to 30cm

Benefits for UK Wildlife

• Flowers attract bees and other pollinating insects during summer.
• Works well in wildlife-friendly pondside planting.
• Provides cover for small beneficial insects in dense foliage.

Why Grow Iris 'Frosted Intrigue'

• Large blue flowers stand out in summer borders.
• Ideal for damp soil and water garden planting.
• Clump-forming habit keeps plants tidy.
• Pairs well with other moisture-loving perennials.

Planting Tips

• Plant rhizomes in spring with the crown level with the soil surface.
• Choose a sheltered position with consistent moisture.
• Improve soil with compost before planting.
• Water during dry spells to keep the soil moist.
• Plant near ponds or streams, but avoid planting directly in water.
• Divide mature clumps every few years to keep plants vigorous.

If you want bold summer colour in a damp area of your garden, Iris ensata 'Frosted Intrigue' is a strong choice. Plant the rhizomes once and enjoy striking blue flowers each year.