The best way to control crabgrass is to apply preventative treatment such as a pre-emergent herbicide in the spring. The pre-emergent herbicide application will help control the emerging root from the seed.
Pre-emergent herbicide applications are applied in the early spring based on the grass type and specific geography, so it is laid down before the start of the window for crabgrass germination. Typically, crabgrass begins to germinate once soil temperatures reach 55 to 60 degrees Fahrenheit for a few days.
A thick, healthy lawn is the best competition and defense against crabgrass emergence. In addition to a good fertilization plan to thicken up your lawn, spring pre-emergent treatments can keep crabgrass in check during the summer months.
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