I have about an acre in the timber cleared out for a food plot. I have not done any prep work like getting rid of the weeds yet. The soil is not very good as its mostly gravel. I bought the throw and grow and was hoping to get it down between the third and fourth weeks in august. Could i spray the ground tomorrow with anything other than roundup and still get stuff to grow also considering the soil type? The soil does grow weeds and grass so i think it will grow with some fert. Any suggestions?