Well my solution was to move to 5 acres and just keep adding more of it to my garden,,,that worked for me until we moved to a smaller acreage.  Then I found out how truly hard to improve this  clay soil was and went for purchased soil in raised beds, and that limited my space real quick!  Besides,  I "retired" from being a cut flower seller.  But I am so glad I got to do it for that time...