Gilbert Fritz wrote:Are you going to use mulch around the trees eventually? I suppose on this scale it might be difficult. Martin Crawford in England used long strips of some type of fabric to suppress grass. Meanwhile, he would plant running ground covers on one side, which would start rooting and running under and over the weed block fabric. In a year's time, he would move the strip on width over; and the ground covers would follow. He planted all the trees for the orchard in the first year, and used a square of weed block fabric around each, until the rolling fabric/ ground cover treatment got to them to suppress weeds for good.
I don't know if this helps you or not.