Our round 1 application consists of slow release stabilized nitrogen fertilizer and a pre-emergent weed control product. Our pre-emergent weed control products will reduce or stop the emergence of yellow foxtail, crabgrass and goosegrass. Pre-emergent weed control and fertilizer products used in our round 1 application are granular. We apply pre-emergent products on the high-end of the manufactures recommended rate. The more product in the soil, the better the results.
When to apply a round 1 application.
Our round 1 applications are started when the soil temperature reaches a consistent 55 degrees F. Since this is a time sensitive application, all pre-emergent products must be put down before seed germination. Crabgrass seed starts germinating when the soil temperature reaches around 70 degrees F. If you apply your product too early, it can wear off. If you apply your product too late, it will not kill an already existing plant.
During our round 1 application, we also spot treat for broadleaf weeds. Since we are spot treating, only the weeds actively growing will be controlled. The pre-emergent products that we apply for grassy weeds are not labeled for broadleaf weed control. You may have broadleaf weeds emerge with-in a few days of your application. This is normal, because our round 1 application is only designed to create a barrier for crabgrass control and provide nutrients to your turf. Our round 2 application is designed to control broadleaf weeds.
All round 1 applications should be done prior to May 15th if you live in eastern Iowa. Since temperature plays a key role in this application, the May 15th cut off may be extended or ended early depending on the weather. We want your application to be a success, so we only work with-in a short window.
Sometimes other grassy weeds can be mistaken for yellow foxtail, crabgrass and goosegrass. If you have any questions about a weed in your lawn, please give us a call. Depending on the type of weed present in your lawn, your lawn may require a separate application for its control.