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06

Work backward from frost

Seed-starting date planner

Choose a crop and your local last-frost date to create an indoor sowing and transplant window.

Live worksheet

Enter your measurements

Uses the date you supply—no location tracking
Start indoorsMar 15, 2026toMar 29, 2026
Transplant windowMay 17, 2026toMay 24, 2026

These are broad planning defaults. The exact variety’s seed packet and local extension guidance should override them.

Read before you buy

Build a seed-starting window from a frost-date range

A calendar works better when it admits weather uncertainty, variety differences, and the time seedlings need to harden off.

Read the guide

Sources & further reading

  1. Starting seeds indoorsUniversity of Minnesota Extension