Any time I am going to get a lot of anything garden related, whether it be top soil, sand, or mulches, I go to our local Co-op. I am talking about by the yard, not bag. When I built my raised garden, enlarged it, and then raised the whole thing by a foot, I used nothing but what our Co-op labels as "Plantation Mix". Other garden centers, lawn services, or Co-ops may call it something else. It is not heavy at all to work and apparently has very little clay. It is a composted mix.