I'm not sure that you need the dimension 60 days apart. Google the bermuda bible and read up on it. As far as the fertilizers, I wouldn't add any P or K without a soil test.

Thanks! So maybe just dimension around March 1 should be good? I've been reading up on the Bermuda bible still have questions. Would it be ok then to use a 39-0-0 as suggested since I have no soil test?

39-0-0 would be perfect at 1# N per 1000 sq ft. I don't know what weeds you are trying to hold in TN, but in Texas where I am we try to put the preemerge out just before soil temperatures reach 55 degrees. For me that's around February 15. Another preemerge application can be made in the fall just before soil temperatures dip down below 55 degrees. For me, that is septmeber 15.

Great! I'll check the average spring soil temps. Would the Stonewall be a good September pre emergent choice? Or is there a better product?

That much chemical fertilizer for a lawn. I use half of that for a golf course a year

Any suggestions then bic9 for a better program? Trying to learn and this was a start and I'm open to any advice. Thanks for the reply.

I use half of that for a golf course a year...

...which is one of the issues we have with your greens greening up. If you want bermuda to look good it needs a full inch of water once a week, frequent mowing at a low setting, and monthly fertilizer with high N.

Your Dimension applications are too close together as someone else indicated. I believe at bag rate it gives protection for 3-4 months. Your February application likely won't require any nitrogen. Lesco makes a 0-0-7 dimension. Also by your app in October/novemeber I doubt you'll need nitrogen. Your grass should be hitting dormancy or about to go dormant by that time.

Any reason for using stonewall in the fall and dimension in the spring?

Thanks sherm1082. Any suggestions what to put down in oct/nov since don't need the extra nitrogen?

I'm only thinking of using stonewall because that's what the sheet the guys at John Deere gave me suggested. Is there a better product for fall and spring pre emergents in granular form?

Stonewall and dimension are both good. I tend to see people on here leaning towards stonewall because it lasts for 6 months. I have used both with success. The sort of weed you're trying to prevent would matter too.

October would probably be the month you want to apply your fall pre-emergent. If you use stonewall, lesco sells one with no nitrogen. I can't remember the numbers though.