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For practical purposes, Canada has adopted the American hardiness zone classification system. The 1990 version of the USDA Plant Hardiness Zone Map included Canada and Mexico, but they were removed with the 2012 update to focus on the United States and Puerto Rico. [8] The Canadian government publishes both Canadian and USDA-style zone maps. [37]
USDA plant hardiness zone regional map - North Central US. The climate is humid continental, displaying both the cool summer and warm summer subtypes as one travels from north to south. [24] The United States Department of Agriculture has the region falling mainly in zone 5a, with the northern fringe being 4b. A few patches in Wisconsin are 4a.
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Hopkins' bioclimatic law states that in North America east of the Rockies, a 130-m (400-foot) increase in elevation, a 4° change in latitude North (444.48 km), or a 10° change in longitude East (two-thirds of a time zone) will cause a biological event to occur four days later in the spring or four days earlier in the fall. [1]
University of Wisconsin–Madison Arboretum: University of Wisconsin: Madison: University of Wisconsin–Madison Botany Garden and Greenhouse: University of Wisconsin: Madison: Yerkes Observatory (50 acre Olmsted-designed landscape) Williams Bay, WI
Wisconsin Dells: Juneau: Central Sands Prairie: 310 acres, public and residential environmental education center, operated by the University of Wisconsin-Extension, 14 buildings including a nature center and a raptor enclosure housing educational birds of prey [35] Urban Ecology Center: Milwaukee: Milwaukee: Lake Michigan