When you take a look at the Crabgrass Germination Map below, you realize how early Spring really comes in the world of weeds. Depending on weather and where you live, crabgrass could begin germinating as early as January. At Stone Brothers & Byrd, we recommend Prodiamine for effective pre-emergent control of tough weeds like crabgrass, dallisgrass and many others.
How Does Prodiamine Work?
Pre-emergent herbicides like Prodiamine have a 3-4 month residual in the soil. An application in January will provide continued protection through March, which is when most weeds will become active. Mix 2-3 tablespoons of Prodiamine to one gallon of water to cover 1,000 square feet. As weeds begin to germinate, Prodiamine will sterilize the seed growth before it reaches the critical bi-foliar stage. Remember that Prodiamine is a non-selective herbicide. This means that it will effect all emerging seeds. If you plan to sow grass seed, make sure that your 3-4 month active window of Prodiamine control has past. With this consideration in mind, you can make continued applications of pre-emergent up to three times per year. This can provide year-round control.