Free Planting Calendars for Every US ZIP Code
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Enter your ZIP code, city, state, or USDA zone and get a personalized planting calendar based on your local frost dates.
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We calculate start, transplant, and harvest windows for 147 plants.
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About USDA Hardiness Zones
The USDA Plant Hardiness Zone Map divides North America into 13 zones based on average annual minimum winter temperatures. Each zone is 10°F warmer (or colder) than the adjacent zone.
Understanding your hardiness zone is essential for selecting plants that will thrive in your climate and determining the best planting times throughout the year. Your last frost date is the key factor in calculating when to start seeds indoors or transplant seedlings outdoors.