Northern Blueflag Iris (Iris versicolor)

Northern Blueflag Iris

Iris versicolor

Northern Blueflag Iris is a native wetland species that grows between 1 and 3 feet tall. It is commonly found in marshes, along pond edges, and in wet meadows. This iris prefers moist to wet, rich soils and can tolerate standing water. Its striking blue-violet flowers bloom in late spring to early summer, providing important nectar sources for pollinators. It is often used in rain gardens, shoreline restorations, and water garden plantings due to its ornamental appeal and ability to stabilize soil in wet conditions.

Characteristics

Product Form	Plant, Seed
Type	Forb
Sun	Full Sun, Partial Sun, Shade
Soil	Clay, Loam, Sand/Gravel, Peat, Calcareous
Moisture	Wet, Aquatic
Average Max Height (inches)	48
Suggested Plant Spacing (inches)	12
Bloom month(s)	May, June, July, August
Bloom Color or Type	Blue, Violet
Dominance	Medium

Range Maps

Sowing Information

Sow seed onto a firm, weed-free seedbed. Hand-broadcast seed making two perpendicular passes for even coverage. If planting a mix, broadcast the grass component first and lightly rake/drag it into the top 1/8–1/4" of soil. Next, broadcast wildflower/forb seed and press it into the soil surface (with a roller/cultipacker or the back of a rake) to ensure good seed-to-soil contact. After seeding, apply a very light layer of clean, seed-free straw (or other weed-free, site-appropriate mulch) to reduce erosion and retain moisture without smothering seedlings. A good rainfall or thorough watering will help settle seed and mulch and improve germination.

Planting Information

Dig a hole in your planting site slightly larger than the plant’s root system. When placing the plant into the hole, ensure that the soil line remains consistent with its original level in the pot. Fill in around the roots with the excavated soil, gently firming it to eliminate air pockets. Water the plant thoroughly the same day to promote successful establishment.