NE Florida Lawn advice - help

I live in Jacksonville, Florida. Tempuratures are into the upper 90's on most days lately. I applied weed and feed earlier in the year and then atrizine(sp) during April when tempuratures were within specifications. Most of the weeds died off. However, now those same weeds are popping up again. Admittedly, I'm not a person who enjoys managing his lawn. So, I'm looking for a product that will help control dollarweed and other tough weeds like some of the nutsedges that will not burn the lawn in these high tempuratures. Any advice some of you could share?
Also, we're re-sodding most of the front yard next week. I realize frequent watering is necessary but, I was curious about whether I could use fertilizer on the new sod to promote growth?

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