– A lot of people in Salt Lake ask us if it’s okay to fertilize right before we get some rain, or if the sprinklers come on after the application. There’s a couple different answers, in most cases it’s actually probably better if it rains after the application, it helps water in the application, get it nice and deep into the root system. One case where I wouldn’t do it is if you have a lawn full of weeds and the application you are doing or your company is doing has good a weed control because it’s basically diluting the weed control. So go ahead and follow it’s recommendations. I want you to have a really green and weed free lawn this year.?