perennial · design plant record

Iris versicolor

Northern blue flag

Sword-shaped leaves and flowers for a moisture-tolerant planting edge.

Photographs show the source plant or captioned cultivar, season and setting. They do not document one of our illustrative garden layouts as a built project.

Height at maturity

0.61–0.91 m (2–3 ft)

Spread at maturity

0.61–0.76 m (2–2.5 ft)

Light

Sun / Part shade

Moisture

Moist, draining soil / Wet-soil tolerance (check details)

Source-reported USDA zones

3–9 · verify subzone and cultivar

Principal seasonal role

Spring, Summer, Autumn

Fit it to the site

Rich moist to wet soil in sun or partial shade.

A wet-edge plant is not a drainage remedy or a specification for pond depth.

Keep the care in the decision

Review expanding rhizomes and inspect damaged foliage; use locally appropriate seasonal cut-back timing.

Origin & safety checks

Central & Eastern Canada to North Central & Eastern U.S.A. Confirm local native range and restrictions.

The source flags poisonous parts or harmful exposure. Check the exact plant and household exposure before purchase; no edible or pet-safe use is inferred.

Check current invasive restrictions with your local plant-health or extension authority. For pets, use the exact botanical name in a veterinary toxicity reference; for potential ingestion or exposure, get appropriate professional advice rather than relying on a design guide.