Blueberry bushes can be one of the most care free plants in your garden. Blueberries are no longer a northern crop. University of Florida has produced several field proven var. that require as little as 200 chill hours to produce a sizable crop. These Southern High Bush Var. can be grown in zones 5-10 meaning the Southern High bush is no longer for the South either giving growers in the north the ability to grow the high yielding southern varieties in northern climates. Blueberries do best when inter planted with other varieties of blueberries. This ensures full cross pollination and a bountiful crop.