Give these guys a call. If they won't come down there, they might be able to help you find someone closer to you who will.
AJ Southwest Landscape
4309 Village Creek Rd.
Fort Worth, TX 76119
817 232-2785
www.ajsw.com
Yes, you can put compost on your yard at anytime. Just don't put it on too thickly. A half-in to an inch at a time will do wonders. Think about using compost tea or one of the liquid compost products and molasses to water in a spread of horticultural cornmeal. And remember you can spread a good organic fertilizer anytime of year without fear of burning or harmful effects. By the way, Sam's Nursery in Hubbard has a selection organics as do several locations the other direction in Burleson.
Hope that gets you started on the right track.
Kathe