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When to plant peas in zone 4a

In zone 4a, where the last spring frost typically comes around May 13, sow outdoors April 1 to 15. For a fall crop, plant July 6 to 20.

The zone 4a schedule for peas

Sow outdoors
April 1 to 15
First harvest, roughly
May 31 to June 24
Plant for a fall crop
July 6 to 20

From the median frost dates of the NOAA stations assigned to the 739 ZIP codes in zone 4a, and the timing recommended by Cooperative Extension guides for peas.

Dates before the last frost assume the soil has thawed and is dry enough to work: a squeezed handful crumbles instead of sticking. After a late or wet spring, wait for that even if the date has passed.

Frost risk in zone 4a

Zones are based on winter cold, not on frost dates, so the last spring frost varies a lot within a zone. Across zone 4a, the typical last frost ranges from about May 6 in the earliest tenth of ZIP codes to May 24 in the latest tenth, and the first fall frost from September 20 to October 3. For a typical place in the zone:

  • April 30Risky: a later frost happens in 9 years out of 10
  • May 13Typical: frost after this date in half of years
  • May 27Safe: a later frost only 1 year in 10

Your dates for peas

Set your ZIP code at the top of the page and we will work out when to plant peas where you live, from the frost records of the nearest NOAA weather station. Your ZIP code is remembered on this device only.

Enter your ZIP code

Peas in zone 4a cities

CityTypical last frostPlantFall
Fargo, NDMay 10Mar 29 to Apr 12Jul 8 to 22
Bismarck, NDMay 14Apr 2 to 16Jul 5 to 19
Grand Forks, NDMay 10Mar 29 to Apr 12Jul 9 to 23

How to grow peasAll zonesPeas in zone 3bPeas in zone 4bAbout zone 4a

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