Yellowflag IrisIridaceae or Iris Family
Iris pseudoacorus

Growth habitat: Herbaceous perennial, grows 3 to 4 feet tall.
Leaves: Long, linear, dark green leaves emerging in a fan-like arrangement. Leaves are smooth edged, flattened and sword-like with a pointed tip.
Stems: Several flowers are born on erect flower stalks.
Flowers: Large pale to deep yellow flowers have three downward pointing and three upward pointing petals. Some petals have light brown to purple veins or flecks.
Roots: Rhizomatous root system.
Seeds: Each fruit contains many flat brown seeds.
Yellowflag Iris FlowerReproduction: By both rhizomes and seeds.
Habitat: Wetland species that grows in water up to 10 inches deep.


Hand pulling:  Hand pulling or digging and removing the rhizomes of yellowflag iris can be effective if you can remove all of the rhizomes from the site.  Rhizomes should be bagged and removed from wet sites and allowed to dry before burning.

Mowing:  Yellowflag iris is a semi-aquatic species that tends to grow in areas where mowing is not practical or effective.  Mowing or cutting is not a recommended method of control.

Biological control: N/A

Grazing:  Yellowflag iris is avoided by livestock.

Herbicide:  Herbicide treatment is limited to aquatic labeled glyphosate.  Always consult product labels and read them carefully to ensure correct species/land management usage and chemical application.

Trade Name: Active Ingredient: Rate: Efficacy: Comments
 Aquaneat Aquatic glyphosate 8% solution Effective when applied prior to full bloom with an aquatic approved surfactant.  Be sure to use aquatic labeled glyphosate.




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