Fargo, ND · zone 4a · ~143 frost-free days
When to plant in Fargo: frost dates and zone 4a.
In Fargo, the typical last spring frost lands around May 10 and the first fall frost around Sep 30, giving you about 143 frost-free days. Cool-season crops go out before the last frost; warm-season crops wait until after it.
The 2026 windows
Sow dates for Fargo, keyed to your frost.
| Crop | Start indoors | Spring sow / set out | Fall sow |
|---|---|---|---|
| Tomato, slicing | Apr 5 to May 24 | May 17 to Jul 5 | — |
| Lettuce, leaf | — | Apr 2 to May 17 | Jul 17 to Sep 15 |
| Carrot | — | Apr 2 to May 5 | Jul 5 to Jul 31 |
| Bush Bean | — | May 10 to Jun 30 | — |
| Cucumber, slicing | — | May 17 to Jul 14 | — |
| Pepper, bell | Apr 14 to May 27 | May 26 to Jul 8 | — |
| Kale | Feb 19 to Mar 19 | Apr 2 to Apr 30 | Jun 30 to Aug 15 |
| Spinach | — | Mar 19 to Apr 30 | Jul 17 to Sep 4 |
Fargo sits in Zone 4a, but two gardens in the same city can be a week or two apart. The planner works from your ZIP code's frost dates, not the zone, so the dates land right for your block, not the metro average.
Build your Fargo garden plan.
Tell the free planner what you want to eat and who you're feeding. It returns plant counts, spacing, and frost-safe sow dates for ZIP 58102 in about 60 seconds.
Fargo planting questions
What planting zone is Fargo, ND?+
Fargo is in USDA hardiness zone 4a. Growing zone, gardening zone, and planting zone all mean the same thing: the USDA number, 4a here. It tells you what survives winter, not when to plant. Frost dates set your planting time, and the free planner uses your exact ZIP code's frost dates, which can differ by weeks across one metro.
When is the last frost date in Fargo?+
The typical last spring frost in Fargo, ND is around May 10. That is an average from local history, not a guarantee, so tender crops like tomatoes and peppers are safer with a week of buffer after it.
When is the first frost date in Fargo?+
The typical first fall frost in Fargo, ND arrives around Sep 30, closing a growing season of roughly 143 frost-free days. Count backward from it to find the last date a fall crop can still finish.
What can I plant now in Fargo?+
It depends on the date. Cool-season crops like lettuce, kale, and spinach go out weeks before the last frost; warm-season crops like tomatoes and peppers wait until after May 10. The table above shows each crop's window; the free planner turns your ZIP into an exact, dated calendar.