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Pests & Disease
American Horticultural Society Hardiness Zone Map
American Horticultural Society USA plant hardiness zone map. You can also look your zone using your zip code.
Hardiness Zones for Canada
Agriculture and Agri-Food Canada - The Nation Land and Water Information Service.
Landscape Rose Cane Hardiness Ratings, 1999 and 2001
Two hundred roses are rated on a scale from 1 to 10 on the winter survival of their canes in Zone 4. This test was run at Bailey Nurseries display garden in St. Paul, Minnesota and at the Minnesota Landscape Arboretum in Chanhassen, Minnesota.
Performance of Shrub and Old Garden Roses At the Minnesota Landscape Arboretum
An evaluation of many roses for their appropriateness for growing in Minnesota, considering both disease-resistance and hardiness.
Plant Hardiness Zone Map of Maine (USA)
Detailed plant hardiness map of Maine courtesy of the University of Maine.
Plant Hardiness Zones for Australia
Plant Hardiness Zones for Australia courtesy of the Australian government (1991)
Plant Hardiness Zones for Canada
More zone maps from Agriculture and Agri-Food Canada - The Nation Land and Water Information Service.
Plant Hardiness Zones for Europe
Plant hardiness maps for Europe courtesy of GardenWeb. Click on the map to view more detailed area maps.
USDA (new) Plant Hardiness Zones Map
An Updated USDA hardiness zone map courtesy of Texas A & M University.
USDA Plant Hardiness Zone Map and lots of other useful information.
The 2003 US National Arboretum "Web Version" of the 1990 USDA Plant Hardiness Zone Map. Detailed maps by region.
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