Crabgrass Pre-emergent Application Timing

WE ARE HARVESTING OUR FESCUE AND BLUEGRASS TODAY! The soil temperature at the farm today is 38 to 39 degrees. The best defense against crabgrass and all weeds is a dense and healthy stand of grass. If your stand of grass is a little weak and open then there is a possiblility of crabgrass and weed encroachment. We need to remind ourselves that crabgrass doesn’t germinate until the soil temperature is 50 to 55 degrees. Knowing your soil temperature is the key to the timing of your crabgrass pre-emergent application in the spring. Soil temperatures vary depending on location. The closer you are to an urban area (St. Louis City), the higher the soil temperature. This is because of the heat generated from buildings, roads, parking lots, lights etc. Check your soil temperature in the area of your lawn that gets the most sun and also near your driveway and sidewalks. This is where soil temperature will be highest. You can purchase a soil temperature gauge at our office. This gauge will save you at least one application of fertilizer and/or chemical every year. A soil temperature gauge is one of the best investments towards having a healthy and beautiful lawn!