May 8, 2017
Weed Management 101: How to Identify and Treat Crabgrass
Identifying crabgrass
When it first appears, a crabgrass seedling resembles a small corn plant. The leaf blades are ¼-inch wide or more, and the blades angle out from the stem. The stem continues to grow up as new blades appear. Side shoots appear rapidly in the developing seedling.
As the stem, or branches, get larger, they fall to the ground and start growing out in a star pattern. The plant will continue to push up new shoots from the center, eventually leading to a thick mat of weed.
Treating crabgrass
Crabgrass germination occurs when soil temperatures have reached 55 degrees for 24 to 48 hours. In Northern Minnesota, this typically means between late April and early May.
Crabgrass is one of the first weeds to germinate in the spring, which means pre-emergent herbicide treatment must be timed correctly. Pre-emergent herbicide provides a protective barrier that stops weeds before they grow.
Proper selection of a selective pre-emergent herbicide to control crabgrass is critical. Always apply the product at the proper dosage. It is better to repeat a treatment than to use a stronger dosage.
Treating crabgrass can be difficult without professional help. At Guardian, we offer targeted herbicide application that keeps this unsightly grass from taking over your yard. Contact us to get started.
