Jessup Landscaping

Did You Know,

Crabgrass seeds can germinate each year when nighttime soil temperatures reach over 50 degrees for 3 days. This “wakes up” the seed, and starts it on its process of growing up to be your worst nightmare.

Note, the seed “can” germinate at that point. So common thinking is to have the preemergent applied no later than this. That could mean a December application in Southern California, but April in Ohio.

So you can diligently observe soil temperatures, either through your own monitoring, or a local source. Perhaps the newspaper in your area provides such information, or the county agricultural department. State universities may provide this information on a website as a guideline for when to apply crabgrass preventer and other products.

But, how much of the current crabgrass seed lurking in your yard will germinate this early?

The earlier that you apply the preemergent, the sooner it will lose effectiveness. The duration of effective control depends on the type of product, and how heavy of a concentration you apply.

The control could last 2 to 3 months, or longer than 4 months, depending on several factors. So the date chosen as when to apply crabgrass preventer could determine if you need to do it one or two additional times.

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