http://www.wisconline.com/almanac/ga...hardiness.html http://www.wisconline.com/almanac/ga...hardiness.html http://www.wisconline.com/almanac/garde ... iness.html USDA Wisconsin Plant Hardiness Zones http://www.wisconline.com/almanac/ga...hardiness.html http://www.wisconline.com/almanac/ga...hardiness.html http://www.wisconline.com/almanac/ga...hardiness.html USDA Plant Hardiness Zones for Wisconsin http://www.wisconline.com/almanac/ga...hardiness.html http://www.wisconline.com/almanac/garde ... iness.html