There is no breed of grass able to thrive on both a Vermont ski slope and a Florida orange grove.  For this reason, grasses are divided into two main groups, cool-season, and warm-season, and then further divided into two subgroups,  transition zone and native. Cool-Season Grasses Cool-season grasses all thrive in northern areas, including Canada, as well as higher elevations farther south.  The main growing period for cool-season grass is in…