ok I have a hybrid bermuda (tifway 419?). I am in oklahoma and it is already starting to green! 1.) When should I aerate my lawn? 2.)When should I use pre-emergant. I already have some weeds so should I skip P.E. and get some other type of weed killer? I have an outside dog, is there any stuff that is safe for him? 3.) My yard has a bunch of dips and slopes in it. Should I just fill it in with some coarse sand? WHen is the best time to do this? Thanks guys, this is my first home and I didn't know that it would be this much work!