Quick question for the fert experts. When you time your pre-em applications where do you check the soil temps? I know you wait until the soil temps need to be 50 degrees for three consecutive days for crabgrass germination to begin. My question is when you check the temp of the soil, do you check the soil next to driveways or in the middle of the yard? Today I checked and the soil along driveways and sidewalks are right at 50 degrees but the soil in the middle of the yards are still around 40 degrees. Until this year it never dawned on me that the concrete and asphalt acts as a heat sink and warms the soil along its edges sooner than the middle of the yards. Where do you guys check the soil for its temp. Regardless I am going to pick up my crabgrass preventer tomorrow and start putting it down ASAP. I fell behind this year because of the birth of my baby a couple days ago.