When Should I Apply Crabgrass Pre-Emergent in Minnesota?

One of the most common questions we get asked is when to apply early-stage fertilizer. Because Minnesota weather can be so unpredictable, it’s important to time the application well.

Many people apply crabgrass pre-emergent to prevent unsavory weeds from sprouting up in their lawn or garden. However, there are many other ways to prevent weeds in your grass.

It’s recommended to apply crabgrass pre-emergent in the first round of fertilizer put down in the spring. There are plenty of pre-emergent herbicides to choose from, but when we’re applying pre-emergent herbicide, we use Dimension. It’s one of the most powerful brands in the landscaping industry so we always recommend it to our customers.

Springtime Is the Right Time for Crabgrass Pre-emergent

In the excitement of spring approaching, lots of people fall into the trap of applying their pre-emergent in April, shortly after the last of the snow melts. However, applying it in April will render the pre-emergent useless come late May, when you’ll want it to be most effective. So, we urge you to hold off. Any winterizing fertilizer applied in the fall, before the snow fell, is still there to kick spring grass into high gear and have it growing healthily enough for you to delay the first treatment of the spring.

If you did apply your pre-emergent fertilizer in April, don’t worry, just replace your June or July treatment with the herbicide blend you used in April. Keep in mind that while Dimension is said to last in your soil for roughly 10 to 12 weeks, excess amounts of rain in April and May will shorten the lifespan to about 6 to 8 weeks. Remember that the soil temperatures should be in the high 40s to low 50s prior to applying your pre-emergent fertilizer blend. One of our favorite tricks of the trade is to apply our pre-emergent when the lilacs start to bloom. Don’t wait too long, though, as crabgrass begins shooting up when soil temperatures reach 55 degrees for more than two days straight.

One more reason we use Dimension is for its post-application properties. Unlike other herbicides, crabgrass seedlings up to four weeks old can be killed by Dimension. This means that if you’re starting to see crabgrass in your lawn, but you missed your prime application window for your pre-emergent herbicide, Dimension still has a shot at working.

The first round of fertilizer is crucial in preventing turfgrass diseases as well as fighting off pesky weeds like crabgrass. If you’re looking to have someone take care of your fertilizer and weed control, visit our page to learn more about our methods.

Have more questions for us? Call KG Landscape at (763) 568-7251, or request a quote to learn which of our landscaping and lawn care services are right for you!