Acorus americanus

Common name: Sweet Flag

Native plant

At first glance, this wetland plant looks a lot like an iris, but on closer inspection, the finer blades and interesting cone-like flowers set this plant apart. We've found it in both healthy and disturbed moist areas throughout the Chicago-land area. The flowers are a greenish white and set very low on the plant. A very nice plant for foliage in a wet garden.


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Price Level: 
Perennial- Standard
Sizing Options: 
Flat of 32 (plugs)
Flat of 18 (pints)

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Plant Details

Plant type

Grass, Forb

Soil type

Moist Mesic, Wet

Light exposure

Eastern Exposure / Morning Sun, Full Sun, Partial Sun / Part Shade

Bloom period


Urban environment

Uncompacted Urban Soils, Road-side/Salt Tolerant, Yards that Flood


Floodplain, Moist Woods, Wetlands

Growth form

Colonizing / Spreading, Rhizomatous/stoloniferous

Growth rate


Flower color

Green White

Fall color



Mature height
2 Feet
Mature width
2 Feet
Max height
4 Feet
Max width
4 Feet

Additional information

Rain garden suited

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