I am located in central Ohio, and I am thinking that I might start my granular preemergence for crabgrass the week of March 6 or March 13. Is this too early, or should I wait more towards the middle or end of March. I don't have alot of accounts, 1 days worth of work, so trying to get them all done before it is too warm is not a factor. I also have some yards that will need to be limed this year. Can this be done at the same time I apply the preemergence, or should there be some time between applications. Thanks.