I am thinking of using the lasagna technique on a portion of my backyard to prepare the clay soil for laying sod next spring. The only thing growing in my back yard are weeds at the moment so a large section of mulch would be an improvement.
I can get cardboard and oak leaves free and probably mulch from the city, what else should I put down? What kind of dirt, compost should I ask for when I buy it?
Thanks - Dan