Free Tool

Frost Date & Planting Window Calculator

Find your typical last and first frost dates, and when to actually start planting.

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Pick your USDA hardiness zone below for typical frost date ranges and a general planting window. These are regional averages — your microclimate (elevation, city vs. rural, near water) can shift things by a couple weeks either direction, so treat this as a starting point, not gospel.

Not Sure Your Zone?

Search “USDA hardiness zone” plus your zip code to find your exact zone from the official USDA map. Zone is based on average winter minimum temperature, which correlates closely (though not perfectly) with frost timing.