Sunset Zone Maps
Climate zone maps show where various permanent landscape plants can adapt. If you want a shrub, perennial, or tree to survive and grow year after year, the plant must tolerate year-round conditions in your area such as the lowest and highest temperatures and the amount and distribution of rainfall.
Gardeners need a way to compare their garden climates with the climate where a plant is known to grow well. Zone maps provide this critical climate information.
Sunset National Garden Map
This map has long been the standard among gardeners who live in the 13 western states, the map now extends to the Eastern Seaboard. It was developed by Sunset Magazine. Click here for details.
Dividing the United States into 45 garden zones, the Sunset map first and foremost recognizes the difference between garden climates in the East and West. Sunset zones 1 through 24 are west of the 100th meridian, and zones 25 through 45 are east of it. This zone-mapping system acknowledges the West's complex gardening regions and recognizes that in many cases neither minimum nor maximum temperatures determine a plant's survival.
Sunset's zones are based on regions where particular plants grow, not on regions that share a feature such as temperature or heat; instead of matching a plant to an established zone, the zone is created to match the plants.