One of the most common ways to prevent the growth of crabgrass is to apply a pre-emergent crabgrass controller in the early spring before the crabgrass starts to grow. Crabgrass begins to grow when soil temperatures reach approximately 54 degrees Fahrenheit.
It’s important to apply a pre-emergent product that is specific to crabgrass as opposed to other weed-killing products. There are chemical and organic options available, and the label should clearly identify the product as a crabgrass controller. Pre-emergent crabgrass controllers can prevent grass seed from growing. Owners of healthy lawns should avoid cutting the grass too short in the spring, which can allow crabgrass to take root.