Planting calendar by ZIP code
Choose a crop and season. We’ll translate local 1991–2020 freeze normals into practical ranges for starting seed, sowing, transplanting, and harvest.
What this planting calendar calculates
It combines a nearby eligible NOAA station's 1991–2020 spring and fall freeze normals with crop-specific offsets for starting indoors, direct sowing, transplanting, and fall timing.
Your result shows a range because a climate normal is a probability estimate, not a forecast for this year's weather.
How to use the result
- Choose spring or fall and the crop you plan to grow.
- Select a freeze probability that matches your risk tolerance.
- Compare the calculated range with current conditions, soil temperature, and the selected variety's seed packet.
Use the separate last frost date and USDA Zone lookup when you need climate context without a crop calendar.
Use the range, then watch the garden
Freeze normals describe probability, not a weather forecast. Soil temperature, variety, protection, and short-term forecasts still matter.
The 50% option is a practical default. Choose 10% for a more cautious spring date or 90% when you accept more frost risk.