14 common garden invaders and the best ways to control them
Hoe or pull nutsedge when it's young and still small ― when plants have fewer than five leaves or are less than 6 inches tall. Older, taller plants are mature enough to produce tubers; when you dig or pull the plant, the tubers remain in the soil to sprout. Repeatedly removing top growth eventually weakens tubers.
For small patches in lawns, dig deeply (8 inches); remove the whole patch, then refill with soil and seed or sod the patch.