Zone 1: This is the coldest zone, with average minimum winter temperatures of -60°F to -50°F. It covers the northernmost parts of Alaska, Canada, and some high-altitude areas in the Rocky Mountains. Learn More >
Zone 2: Average minimum winter temperatures range from -50°F to -40°F. This zone covers parts of Alaska, Canada, and the northernmost parts of the contiguous United States, including North Dakota, Montana, and Maine. Learn More >
Zone 3: Average minimum winter temperatures range from -40°F to -30°F. This zone covers parts of Alaska, Canada, and the northernmost parts of the contiguous United States, including Minnesota, Wisconsin, and New Hampshire.
Zone 4: Average minimum winter temperatures range from -30°F to -20°F. This zone covers much of the northern United States, including the upper Midwest, New England, and parts of the Pacific Northwest.
Zone 5: Average minimum winter temperatures range from -20°F to -10°F. This zone covers parts of the Midwest, Northeast, and Pacific Northwest, as well as some mountainous areas in the West.
Zone 6: Average minimum winter temperatures range from -10°F to 0°F. This zone covers much of the central and eastern United States, including the southern Great Plains, the Midwest, and the mid-Atlantic region.
Zone 7: Average minimum winter temperatures range from 0°F to 10°F. This zone covers the mid-Atlantic region, the southern Appalachian Mountains, and parts of the Southeast.
Zone 8: Average minimum winter temperatures range from 10°F to 20°F. This zone covers much of the Southeast, including Florida, as well as parts of the Southwest.
Zone 9: Average minimum winter temperatures range from 20°F to 30°F. This zone covers much of the Gulf Coast region and parts of the West Coast.
Zone 10: Average minimum winter temperatures range from 30°F to 40°F. This zone covers the southernmost parts of Florida, as well as parts of Hawaii, Puerto Rico, and the U.S. Virgin Islands.
Zone 11: Average minimum winter temperatures range from 40°F to 50°F. This zone covers Hawaii, as well as some coastal areas of southern California and southern Florida.
Zone 12: Average minimum winter temperatures range from 50°F to 60°F. This zone covers Hawaii, as well as some coastal areas of southern California and southern Florida.
Zone 13: This is the warmest zone, with average minimum winter temperatures above 60°F. It covers Puerto Rico and the U.S. Virgin Islands.
