It is time for us to put down Step 1, a slow release lawn fertilizer with a crabgrass pre-emergent. When we see yellow, not in our yard but on the forsythia bush it is time for Step 1 to be applied. If you would like to receive FREE lawn care advice and alerts please email me and I will get you on our DIY Lawn Care database.
Step 1 will control both Large and Smooth Crabgrass by placing a barrier chemical on the top soil. The most common is Large as seen in the above picture. As the seeds try to grow through this barrier it will be killed. Crabgrass likes to infiltrate thin unhealthy turf normally in sandier soils but can be found in clay as well. Even though the plant will germinate when soil temps reach 55 degrees it usually is not noticeable till later in the summer when our good turf starts to slow down due to the summer heat and drought, which crabgrass thrives on. It grows low to the ground from a center shoot than will have a reddish color to it. The most tale sign is the 5 finger seed head, which can produce over 100,000 seeds per plant!! Now is the easiest and cheapest way to control this weed so don't delay, once the forsythia has stopped blooming it could be too late.
Have more questions? Please contact me with any Questions or Concerns. John Krukemyer @ email@example.com