Selective pre-emergent herbicides are applied before weeds appear, preventing the weeds from germinating and appearing in the lawn. When applied correctly, selective pre-emergent herbicides for cool season grasses can be safely used on ryegrass, bluegrasses, fescues, and other cool season grasses.
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Selective pre-emergent herbicides for cool season grasses let you control weeds throughout your lawn without fear that your lawn will be harmed by the application. Choosing an herbicide that is safe to use on your specific type of cool season grass will help to ensure the herbicide won’t harm your lawn.
Selective herbicides only control weeds that are listed on the label, and are formulated so that turf and other plants are not affected by the herbicide. Pre-emergent herbicides control weed seeds when they’re germinating underground, so they are killed before they emerge above ground in your yard. Combined, they create a great product that allows you to prevent weed invasions while keeping your lawn looking its best.
Remember that with pre-emergent herbicides, you have to apply them at the right time of year. In the spring, apply as soon as the soil temperature warms up to about 55 degrees.
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