Earthgro makes a variety of products: potting soil, topsoil, "organic humus and manure" and others. Your subject line said topsoil. If you meant that and what you have is Earthgro topsoil, here is what Scotts (the mfr) says about it in their own website:
Ideal for filling in holes and leveling low areas
Use as a base material to build landscape beds and gardens
Notice it does NOT say it is good for growing things in! It is basically inexpensive fill dirt/sand. If that is what you are using you need to be sure to add amendments for soil fertility and health such as compost, aged manure, earthworm castings, etc.