A plant's performance is governed by many climate related factors including the length of the growing season, the amount of rainfall, winter lows, summer highs, wind or humidity.
Various initiatives have taken place to determine how well plants would withstand the cold winter temperatures (Plant Hardiness Zones) or when plants would start suffering from the heat (Plant Heat Zones).
A more sophisticated approach has been followed by Sunset which defines Climate Zone Maps based not only on hardiness or heat tolerance, but also on precipitations, wind, humidity and various other climate related factors.
Hardiness Zones in Canada
Be aware of the hardiness zone of your area before you decide to buy plants. Some plants might not survive over winter! Canada's plant hardiness map provides insights about what can grow where. It combines information about a variety of climatic conditions across the entire country to produce a single map.
Hardiness Zones of Europe
The European Hardiness Zone Map divides Europe into 11 zones, ranging from -45,6°C to 4,4°C. If you are planning to buy a shrub, perennial or tree, you need to make sure that this new plant will tolerate year-round conditions in your area.
Hardiness Zones in Australia
Australia lies in Plant Hardiness Zones 7 through 12 with some variations across regions and seasons. 5 main regions can be identified in Australia: Arid Region, Cool Mountain Region, Sub-tropical Region, Temperate Region and the Tropical Region.
Hardiness Zones in the USA
The USDA Hardiness Zone Map divides North America into 13 zones of 10°F each, ranging from -60°F (-51°C) to 70°F (21°C). If you are planning to buy a shrub, perennial or tree, you need to make sure that this new plant will tolerate year-round conditions in your area.
Gardening in the Pacific Northwest Region
Selecting plants suited to the diverse Pacific Northwest climate is a key step to success.
While the climate of this region provides enough natural moisture, sunlight and summer warmth to successfully grow a wide variety of plants, there are still a few challenges
Plant Hardiness, Heat Tolerance and Climate Zones
A plant's performance is governed by many climate-related factors including the length of the growing season, the amount of rainfall, winter lows, summer highs, wind, or humidity.
Gardening in the Northern and Central Midwest
Selecting plants suited to the diverse Northern & Central Midwest climate is a key step to success. The Midwest lies in USDA Plant Hardiness Zones 3 through 6, one of the widest ranges in the U.S., and in AHS Heat Zones 1 through 8.
Gardening in New England
Selecting plants suited to the diverse New England climate is a key step to success.
Hardiness Zones in France
France lies in USDA Plant Hardiness Zones 6 through 10 with some variations across regions and seasons. However, generally speaking, France enjoys 4 distinct seasons characterized by cool winters and mild summers, but mild winters and hot summers along the Mediterranean with occasional strong, cold, dry, north-to-northwesterly wind known as 'Mistral
Hardiness Zones in the United Kingdom
The United Kingdom lies in USDA Plant Hardiness Zones 6 through 9 with some variations across regions and seasons. It enjoys a temperate maritime climate characterized by cool winters and warm summers.
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