When to plant sunflowers in North Dakota

Sow outdoors in Fargo

May 4–May 25

Across North Dakota the window opens between May 4 and May 21. Find your city below; the dates follow each town's own average last frost.

Sow outdoors up to 3 weeks after the last frost. Sow every two weeks until midsummer for flowers through fall.

Sunflowers planting dates by city

Start indoorsPlant outSow outdoorsFall plantingAverage last and first frost

JanFebMarAprMayJunJulAugSepOctNovDec

FargoMay 4–May 25

BismarckMay 10–May 31

Grand ForksMay 10–May 31

MinotMay 10–May 31

West FargoMay 4–May 25

WillistonMay 21–Jun 11

DickinsonMay 20–Jun 10

MandanMay 13–Jun 3

When should I plant sunflowers in North Dakota?

In Fargo, sow outdoors from May 4 to May 25. Across North Dakota the window opens between May 4 and May 21, depending on the local last frost.

How is this date worked out?

Sow outdoors up to 3 weeks after the last frost. Frost dates are NOAA 1991–2020 averages for the weather station nearest each city.