2 named cultivars

perennialN. America Native

Copper Iris

Iris fulva

The Story

Plant Bio

Iris fulva, the copper iris, is a beardless rhizomatous iris native to the central United States, standing two to three feet high in wet ground. Narrow arching leaves rise from spreading rhizomes, and the flowers are an unusual coppery brown through shades of orange-red, with drooping falls and no beard. It blooms in May and June.

The colour is genuinely rare among hardy irises and is the reason to grow it, but it depends on wet feet: this is a plant for pond margins, rain gardens and heavy wet clay, and it will grow in up to six inches of standing water. In an ordinary well-drained border it slowly dwindles rather than failing outright.

Uses & Benefits:

Coppery orange-red flowers unlike any other hardy iris, over neat arching foliage.

Thrives in wet clay and standing water where most perennials rot, making it useful in rain gardens.

A central US native whose flowers are worked by hummingbirds; the rhizomes bind wet soil.

Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9, 10

Water

High

Humidity

High

Lifespan

Perennial

Native To

Central United States

Toxicity

Toxic if ingested

Planting

How to Grow

Plant rhizomes in late summer or early autumn.
Choose a consistently moist to wet, slightly acidic site.
Set rhizomes just below the soil surface.
Give full sun, or part shade in the southern range.
Keep the soil wet; standing water is tolerated.
Divide congested clumps every few years after flowering.

Pro Tip

Unlike bearded irises, this one wants its rhizome covered and the ground wet; treating it like a border iris is what kills it.

Keep It Thriving

Care Guide

Do

Keep the soil consistently wet 💧
Plant it at pond margins or in rain gardens 🪷
Set the rhizome just below the surface 🌱
Divide congested clumps after flowering ✂️

Don't

Treat it like a bearded iris in dry soil ❌
Let the ground dry out in summer ❌
Plant it in deep shade ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Divide
Water

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Pond and stream margin plantingRain garden and wet low spotBog garden and water garden edge

Companion Plants

Swamp Milkweed Cardinal Flower Joe Pye Weed Blue Flag Iris Sweet Flag

Multiply

Propagation Methods

Good to Know

Common Questions

Copper Iris questions

What zones can Copper Iris grow in?

Copper Iris is hardy in USDA Zones 5–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Copper Iris deer resistant?

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

When does Copper Iris bloom?

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

Does Copper Iris need full sun?

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