XL 2G Granules are safe to use on tall fescue and warm season grasses such as bahiagrass, bermudagrass, buffalograss, centipedegrass, St Augustinegrass and zoysiagrass.
XL 2G Granules - 50 lb. bag coverage varies on the application rate you are using. You will use 4.6 - 6.9 lbs. per 1,000 sq.ft. At most one bag will cover 11000 sq feet.
The product label (instructions) for XL 2G Granules can be found here: http://www.domyownpestcontrol.com/msds/xl%202g.pdf