This perennial grass spreads by seed and underground rhizomes. The stems are smooth and 35 cm to 140 cm (1-4.5 ft.) high. The leaves are flat and slightly hairy on the upper surface. There are clasping auricles at the base of the leaf blade. The spikelets have three to seven florets, attached broadside to the flowering stem. There are two horizontal rows on each spike.
The seeds are yellow or white and can remain in the soil for more than one year before germinating.
Quackgrass can cause reductions in seed filling and the weed seeds can be a contaminant in forage seed. The rhizomes often get tangled in harvesting equipment (e.g., in potatoes).
Crops
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Canola
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Chickpeas
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Dry Beans
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Flax
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Lentils
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Onions
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Oriental Mustard
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Peas
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Potatoes
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Seedling Alfalfa
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Soybeans
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Sunflowers
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