sentence: it contains a home demonstration garden , vegetable garden , herb garden , home fruit and nuts garden ( including black , persian and japanese walnuts , pecan , shellbark and shagbark hickory , chinese chestnut as well as dwarf apple cultivar , an american persimmon and native pawpaw trees ) , the all america selection trials garden , perennial collection , ground cover demonstration , woody plant collection , and a '' walk across kentucky '' that simulates kentucky 's seven regional landscapes : bluegrass , knobs , appalachian plateaus , cumberland mountains , mississippian plateaus and outer nashville basin ( pennyroyal ) , shawnee hills , mississippi embayment and alluvial basin ( jackson purchase ) .