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USDA Plant Hardiness Zones for Wisconsin

This is an enlarged version of the 1990 USDA Plant Hardiness Zone Map, for the state of Wisconsin. USDA plant hardiness zones are used to select perennials, landscape plantings and fruit trees that will survive over winter in your location. Check the color of the section in your area on the map with the color key below. Please note that zone boundaries are approximate! Especially if you are near a boundary area, your local topography, orientation and exposure will be significant in determining your plantings' hardiness.

Wisconsin Plant Hardiness Zone Map

USDA Hardiness Zones and Average Annual Minimum Temperatures
Zone Average Annual
Minimum Temperature
Representative Woody Plants
3a -35° to -40° F Aronia melanocarpa (Black chokeberry)
Cornus alternifolia (Pagoda dogwood)
Juniperus communis (Common juniper)
Malus baccata (Siberian crabapple)
Spirea alba (Meadowsweet)
Spirea tomentosa (Hardhack)
Thuja occidentalis (American arborvitae)
Viburnum lentago (Nannyberry)
3b -30° to -35°F
4a -25° to -30° F Acer saccharum (Sugar maple)
Hydrangea paniculata (Panicle hydrangea)
Juniperus chinensis (Chinese juniper)
Ligustrum amurense (Amur River privet)
Parthenocissus quinquefolia (Virginia creeper)
Spiraea x vanhouttei (Vanhoutte spirea)
4b -20° to -25° F
5a -15° to -20° F Cornus florida (Flowering dogwood)
Deutzia gracilis (Slender deutzia)
Parthenocissus tricuspidata (Boston ivy)
Taxus cuspidata (Japanese yew)
5b -10° to -15° F

Temperatures listed are the average yearly minimum temperatures, not the coldest temperatures ever recorded. A plant not fully dormant can be damaged at much warmer temperatures. Other factors, including soil conditions, chilling requirements and growing degree days, are critical to plant performance within a climate zone.

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