But depending on the size of the problem, this can be a lot of work. You can also pull the plants out by hand. But if they’ve already set seed, the problem will return next year. Post-emergent herbicides kill the crabgrass that’s already growing. So it’s a good idea to use a pre-emergent herbicide in early spring. In order to control crabgrass, the best method is to prevent the seeds from germinating. Which is lower than the recommended height for mowing lawn grass. Like many other types of weeds, if you leave crabgrass to grow it will crowd out and smother your lawn grass as it takes over.Īnd mowing won’t help you get rid of the problem, as they can set seed even when they’re only ½ inch tall. And when they die, these seeds are left behind ready to germinate in spring the following year, leading to an infestation. But what it does during that year can have long-term consequences for your lawn.Ĭrabgrass plants produce up to 150,000 seeds. It’s a common annual weed that germinates, grows, and dies within the space of a year. Only, unlike the rest of your lawn, its coarse texture, thick blades, and lateral growth cause it to stand out and look unsightly. Eliminating The Problem 11 Common Weeds That Look Like Grass Crabgrass ( Digitaria spp.)Ĭrabgrass (also called finger grasses) looks like grass and is difficult to controlĬrabgrass is an invasive weed that looks similar to grass.
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