i have a customer who wants to install st Augustine sod in her back yard on what used to be a vegetable garden. it is about 14'x50' and the ground is quite soft - i am sure from constant tilling and replanting. when walking on it, it leaves impressions. the soil is not damp or wet. i haven't gotten the soil tested yet but would i need to install top soil to firm this area up? also, a big problem is access. this is in the back part of a yard that has a pool. this yard is multilevel (it is raised about 2 1/2' with a retaining wall). and separating the pool area are shrubs except for a 3' step to access this yard. only about 3' between pool and house so it is a tight fit all around. almost lost my mower in the pool just getting back there to knock down the weeds. is she better off doing something else?