AN UNEXPECTED GEM in the middle of Texas, Alldredge Gardens is more than just a beautiful place to buy plants. They take great pride in their full-service approachto every aspect of gardening: home and nature, inside and out, back yards to the Midland park system. Yes, the park system. Alldredges maintenancestaff maintains all 800 acres of the park grounds in the city.You would think that 800 acres would be enough to overwhelm any garden center operation, but Alldredge somehowalso manages to design, install and maintain their customers landscapes and sprinkler systems, create water gardensand ponds, and provide lawn, tree and shrub care. They even manage to install,design and maintain their customersinterior plants.