The USDA Plant Hardiness Zone Map divides the USA into 13 zones based on average annual minimum winter temperatures. Knowing your zone is the starting point for successful outdoor planting.
How Zones Work
Each zone spans a 10°F range of minimum winter temperature. Zone 1a is the coldest (below −60°F), Zone 13b the warmest (above 65°F). A plant labelled "Hardy to Zone 6" can survive winters as cold as −10°F.
Finding Your Zone
Use GreenScout's free Zone Finder Tool — enter your ZIP code and get your exact zone instantly.
Microclimates
Hardiness is Just One Factor
Zones tell you about cold tolerance, but not heat tolerance, rainfall requirements, soil preferences, or humidity needs. Always check the full care profile.
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