Slender Blue Flag

Iris prismatica

Slender blue flag is a graceful, narrow-leaved iris of coastal marshes and wet meadows, with delicate blue-violet flowers on slim stems, fine for bog and rain gardens.

Family: Iridaceae
Type: wildflower
Lifespan: perennial
Height: 1–3 ft
Spacing: 1–1.5 ft apart
Light: sun
Soil moisture: wet, moist
Soil pH: acidic
Bloom: May, June
Bloom colors: blue, purple
Wildlife value: pollinators, hummingbirds, butterflies
Landscape uses: border, rain garden, erosion control, naturalizing
Native states: MA, NJ, NY