Frost Date Planner Calculator
Plan planting dates around your frost dates. Calculate when to start seeds indoors, transplant, and direct sow.
Inputs
days
weeks
Results
Start Seeds Indoors (day)
92
Transplant Day (day of year)
134
Direct Sow Day (day of year)134
Last Planting Day (day of year)210
Growing Season160 days
How to Use This Calculator
- Enter your last spring frost date as a day of the year (e.g., April 30 = day 120) — find yours on the USDA Plant Hardiness Zone map.
- Enter your first fall frost date (e.g., October 7 = day 280) to calculate your growing season length.
- Enter the days to maturity from your seed packet and the crop's cold hardiness (1=Tender, 2=Semi-hardy, 3=Hardy).
- Enter the number of weeks you plan to start seeds indoors (0 for direct-sow crops).
- Review the Indoor Start Day, Transplant Day, and Last Planting Day outputs to build your complete planting calendar.
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