perennial

Blackberry Lily

Iris domestica

The Story

Plant Bio

Iris domestica, commonly known as the blackberry lily, is an erect, clump-forming herbaceous perennial native to eastern and southern Asia. It produces flat, sword-shaped, medium green leaves arranged in stiff, vertical, fan-like alignments that resemble an open folding fan.

In summer, slender, wiry stems bear loose, branching clusters of bright orange or yellow flowers heavily speckled with deep red spots. These are followed by clusters of shiny black seeds that mimic ripe blackberries and remain decorative into the cold season.

Uses & Benefits:

Features distinctive fan-like foliage, bright speckled summer flowers, and decorative black seed clusters that persist into cold weather.

Provides a low-maintenance, drought-tolerant option for sunny borders and gravel gardens where drainage is high.

Attracts general pollinators such as bees and butterflies, and provides nectar for visiting hummingbirds.

Essentials

At a Glance

Plant Type

Perennial

Height

48"

Width

24"

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9, 10

Water

Low to Medium

Humidity

High

Lifespan

Short-lived perennial (3-4 years)

Native To

Asia

Toxicity

Toxic if ingested; skin irritant

Bloom period

Summer – Early fall

In flower about 4 months of the year

Planting

How to Grow

Select a planting site in full sun to very light partial shade with excellent soil drainage.
Amend heavy soils with sand or gravel to ensure water drains away rapidly from the root zone.
Plant rhizomes just below the soil surface, spacing them 18 to 24 inches apart.
Water moderately after planting to settle the soil, then reduce watering once the root system is established.

Pro Tip

Plant in sharply drained soil, as winter wet or waterlogged conditions will rot the underground rhizomes and kill the plant.

Keep It Thriving

Care Guide

Do

Plant in sharply drained soil to prevent winter root rot.
Provide at least six hours of direct sunlight daily for optimal flowering.
Divide the clumps every three to four years to maintain plant vigor.

Don't

Do not allow the plant to sit in waterlogged or poorly drained soil.
Do not over-fertilize with high-nitrogen products, which causes weak, floppy stems.
Do not ingest any part of the plant or seeds, as they contain toxic compounds.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Perennial bordersCottage gardensGravel gardensNaturalized areas

Companion Plants

Echinacea purpurea Salvia nemorosa Coreopsis verticillata

Multiply

Propagation Methods

Good to Know

Common Questions

Blackberry Lily questions

What zones can Blackberry Lily grow in?

Blackberry Lily 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 Blackberry Lily deer resistant?

Not reliably. Deer may browse Blackberry Lily, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Blackberry Lily bloom?

Blackberry Lily typically blooms in summer through early fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Blackberry Lily need full sun?

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

Is Blackberry Lily drought tolerant?

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