What a great new group, I am a new member! I am building a new rock garden, of course soil is the big question. I plan to place barrier cloth and have a tractor build the area up with delivered soil along with rock placement. Seeking advice on approximate ratio of sand/soil mixture that would be best in my climate , zone 8b. I live rural and very basic choices of types of sand, rock to purchase. Very much appreciate any advice, thank you.