Sowing planner from your local frost date

Enter an estimated last spring frost date for your garden from a local weather service or your records. Then enter the signed number of weeks from your seed packet: negative for before that date, positive for after it, or zero for the same day. Repeat for each crop.

Method and limitations

Sowing date = your last frost date + your signed offset in weeks × 7 days. No regional calendar or crop offsets are supplied. A last frost date is an estimate, not a guarantee: check soil temperature, forecasts and whether the packet refers to indoor sowing, direct sowing or transplanting. This planner is not suited to a frost-free growing season.