Purple nutsedge is primarily a problem in the Southeast and in coastal California. Yellow nutsedge is found throughout the U.S. These perennials are also called nutgrass, cocosedge, or cocograss. Nutsedges prefer poorly drained, rich soil. They thrive in frequently watered garden areas. Nutsedges are particularly noticeable in lawns in the summer, when they grow more quickly than the mowed grass and stand above it. The grasslike, yellow-green leaves grow on erect triangular stems. Seedheads are purple or yellow, appearing from July to October.
Hand-pulling nutsedge is not practical because any tubers left behind will sprout into new plants.
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