Species

Iris irisIris

14 other cultivars

perennial

Imperial Reign Iris

Iris iris 'Imperial Reign'

The Story

Plant Bio

A classic tall bearded iris, forming clumps of sword-like, gray-green leaves from which tall, sturdy stalks bearing large, fragrant, six-petaled flowers emerge in spring.

A striking tall bearded iris with ruffled, blue-violet standards and deeper velvety blue-violet falls edged in a lighter shade. Features prominent yellow-orange beards.

Uses & Benefits:

Irises add striking color and elegance to garden borders with their vibrant blooms and lush foliage.

Their hardy nature reduces maintenance needs and they thrive in a variety of soil conditions.

Irises attract pollinators like bees and butterflies, supporting local ecosystems.

SpeciesIris irisIris

Essentials

At a Glance

Plant Type

Perennial

Height

36"

Width

24"

Light

Full Sun, Partial Sun

Zones

4, 5, 6, 7, 8, 9

Water

Moderate

Humidity

Average

Lifespan

Perennial

Native To

Europe and Asia

Toxicity

Toxic if ingested, especially the rhizome.

Bloom period

Late spring – Late summer

In flower about 4 months of the year

Planting

How to Grow

Tuck iris rhizomes 2 inches deep in well-draining soil.
Water thoroughly after planting to settle soil around roots.
Place in full sun for optimal blooming and growth.
Mulch lightly to retain moisture and suppress weeds.
Divide clumps every 3-4 years in late summer or early fall.
Remove dead or damaged leaves to maintain plant health.

Pro Tip

Plant irises in well-drained soil with full sun for best flowering results.

Keep It Thriving

Care Guide

Do

Water regularly during dry spells 🌱
Remove spent blooms to encourage new growth
Divide clumps every 3-4 years for vigorous flowering

Don't

Avoid overwatering to prevent rhizome rot ❌
Do not plant in poorly drained soil
Refrain from cutting foliage in late fall

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Fertilize
Pest Check
Plant
Prune
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Elegant flower borderColorful perennial bedScented garden accent

Companion Plants

Daylilies Alliums Peonies SalviaLavender

Multiply

Propagation Methods

Good to Know

Common Questions

Imperial Reign Iris questions

What zones can Imperial Reign Iris grow in?

Imperial Reign Iris is hardy in USDA Zones 4–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Imperial Reign Iris deer resistant?

Yes — Imperial Reign Iris is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Imperial Reign Iris bloom?

Imperial Reign Iris typically blooms in late spring through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Imperial Reign Iris need full sun?

Imperial Reign Iris does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Imperial Reign Iris drought tolerant?

Yes — once established (usually after the first full season), Imperial Reign Iris handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.