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Public Plant Profile

Southern Blue Flag Iris

Iris virginica var. shrevei (Southern Blue Flag)

Category: Perennial • Iris

Southern Blue Flag Iris features stunning blue flowers and thrives in wet conditions, perfect for borders and pollinator gardens.

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Mature Height: 2-3 feet

Mature Width: 1-2 feet

Bloom Color: Blue, Purple

Bloom Time: Spring to Early Summer

Light: Part Sun/Part Shade

Zone: Zones 5-9

Maintenance: Low

Growth Rate: Moderate

Season of Interest: Spring

Foliage: Deciduous

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Bold Outdoors Verified Insight

Designed & Reviewed by

Josh Graber

Owner and Landscape Designer · Kansas State University · 25+ Years Experience

B.S. in Horticulture and Landscape Design – Kansas State University

25+ years of industry experience

Description

The Southern Blue Flag Iris is a native wetland plant known for its striking blue flowers and sword-like leaves. It thrives in moist environments and attracts pollinators.

Ideal Conditions

Thrives in full sun to partial shade and prefers consistently moist conditions. Best suited for wetland areas or near water sources.

Soil Preferences

Prefers well-drained, moist soils with a neutral to slightly acidic pH. Adaptable to various soil types.

Sun Needs

Part Sun/Part Shade

Landscape Guidance

Landscape Use

borderpollinator gardenmass planting

Special Features

Attractive blue flowerswildlife-friendly

Wildlife Value

Attracts pollinators and provides habitat for wildlife.

Resistance / Tolerance

Tolerates wet conditions.

Notes from Our Designer

Great for naturalizing in wet areas. Combine with other moisture-loving plants for a vibrant display.

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Design Ideas Using This Plant

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Helpful Next Steps

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Frequently Asked Questions

Is Southern Blue Flag Iris a good fit for Kansas City landscapes?

That depends on sun exposure, moisture, spacing, and how the plant will be used in the overall design. Bold Outdoors evaluates those practical conditions before recommending a plant broadly.

How should homeowners use this plant information?

Use the plant profile as a planning tool for size, conditions, and visual role, then connect it to the broader landscape design and installation plan for the property.

Next Step

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