Free garden tool

Planting Date Planner

Calculate seed-starting and planting dates from your own local frost dates and trusted growing instructions.

Designed for safer planning: this tool calculates dates from information you provide. It does not predict frost or guarantee that a date is safe for planting.

Entries stay in this browser. This tool does not send your entries to NutriHarvest.

Spring Planting Date Planner

Turn “X weeks before/after frost” instructions into calendar dates.

Examples are broad Extension guidance, not variety-specific instructions. Your seed packet and local Extension guidance take priority.

Use a trusted local average, not today's forecast.
For “after frost,” enter 0 in both boxes.

Use this responsibly

  • Use an average frost date from a trusted local source. Average frost dates are not guarantees.
  • Use timing from your specific seed packet or local Cooperative Extension whenever possible.
  • Soil temperature, current weather, microclimate, elevation, variety, row covers and growing method can shift practical planting dates.
  • If current weather is unusual, local guidance takes priority over this calculated calendar date.
Extension sources used for optional examples
Iowa State Extension: Planting and Harvesting Your Vegetable Garden University of Minnesota Extension: Growing Tomatoes University of Minnesota Extension: Growing Herbs University of Maryland Extension: Growing Leafy Greens