Dwarf Crested Iris - Iris cristata

The Dwarf Crested Iris is a delightfully small and compact iris native to wooded uplands in the Midwest and Southeast of the USA. Their native habitat consists of woodland ecosystems or rocky hills sides where they form clumps of bright green sword-shaped leaves with hues of lemon yellow and deep blue.

This low-growing perennial only reaching 6-9 in in height. Their flowers are a striking violet-blue in color with a purple-outlined, bright yellow splotch along the tongue the flower. They are prolific flowerers and will produce multiple blooms measuring 1.5 in across. In the right environment, these fast-growing plants and will quickly form robust colonies.

Plant Details - Dwarf Crested Iris

Family: Iridaceae

Hardiness Zones: 3 to 9

Light Requirement: Partial shade to full shade

Water Needs: Moderate

Height: 3 to 6 in

Spread: 6 to 12 in

Growth Rate: Moderate

Bloom Time: April to May

Flower Color: Pale blue, lilac, or lavender

Wildlife Value: Attractive to pollinators

The Dwarf Crested Iris gets its name from the crested falls (petal-like sepals) of the flower. The crest acts like a landing strip for the pollinators, directing them directly into the stamens and pistil. These flowers are particularly appealing for and easily fertilized by pollinators. These perennials are versatile plants and can be grown across a range of cultivation methodologies. Plant in a container garden for your patio, or in a border garden along a wall or foot path. This native perennial is a delightful addition to the garden.

Landscape Uses and Maintenance - Dwarf Crested Iris

They grow best in an area that provides light shading and will not thrive in full sun. They prefer soils of moist, rich humus and not like to have wet feet, so make sure to plant them in well-drained soil. They are deer resistant and do not have serious pest or disease problems, however they can be susceptible to slugs and snails, so keep your eyes peeled.

To keep them healthy and prepare them for the next year, remove spent flower stems and dead foliage in the autumn. They are rhizomatous and are easily propagated by division.

Noteworthy Characteristics

Attracts pollinators, grows well in dry to moist soils, showy flowers.

Whether you plant this adorably compact, yet showy iris among other perennials in your garden or within a naturalized woodland space, it is sure to be a favorite that you will enjoy watching bloom year after year. Shop for Dwarf Crested Iris plants online at TN Nursery. For 68 years, we have served the landscaping industry and homeowners with specimen plants.

This Is How Your Plants Will Look upon Delivery

Bloom Season

Spring

Bloom/Foliage Color

Purple

Height at Maturity

Under 12"

Care

Dwarf Crested Iris thrives in well-drained soil and requires regular watering to maintain soil moisture. Fertilize lightly in early spring and avoid over-watering. Remove spent blooms and cut back foliage after flowering to promote new growth.

Plant Reproduction

Dwarf Crested Iris spread quickly and easily using underground stems called rhizomes.

How to Grow and Care for Bare Root Perennials, Tubers, and Bulbs

Bare root perennials, tubers, and bulbs are an easy and economical way to jumpstart your garden with lasting beauty. These dormant plants should be planted in early spring or fall while the soil is cool and workable. Before planting, soak bare roots in water for 1–2 hours to rehydrate them. Choose a location based on the plant’s light needs—most flowering types prefer full sun, while others thrive in partial shade.

For bare root perennials, dig a shallow hole and spread the roots out naturally, ensuring the crown is level with the soil surface. For tubers and bulbs, plant with the pointed side facing up at a depth about two to three times their height. Cover with soil, gently press down, and water thoroughly.

Keep soil consistently moist (not soggy) until new growth appears. Add mulch to retain moisture and suppress weeds, but avoid covering the crown or bulb tops. Once established, these plants require little maintenance—just seasonal watering, occasional dividing, and deadheading or pruning as needed. With proper care, they’ll return and thrive year after year.

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