Cool-Season Vegetable

When to Plant Cauliflower in North Dakota

The diva of the brassica family. More temperamental than broccoli but worth the extra attention.

The Short Answer

Cauliflower are cold-tolerant and do well in North Dakota's varied climate. North Dakota gardeners can also plant a fall crop. Rich prairie soils — excellent for gardening. Alkaline in western regions. Heavy clay in Red River...

North Dakota Frost Dates

Your planting dates depend on which part of North Dakota you're in. Here are the frost date ranges by region:

Region	Zones	Last Frost (Spring)	First Frost (Fall)
Western North Dakota	3b, 4a	May 15 - May 30	Sep 10 - Sep 25
Eastern North Dakota	3a, 3b, 4a, 4b	May 10 - May 25	Sep 15 - Sep 30

Cauliflower Planting Schedule for North Dakota

Western North Dakota (Zones 3b, 4a)

Average last frost: May 15 - May 30 · Average first frost: Sep 10 - Sep 25

Start Seeds Indoors

6 wks before frost

Transplant Outside

2 wks before frost

Fall Planting

10 wks before first frost

Eastern North Dakota (Zones 3a, 3b, 4a, 4b)

Average last frost: May 10 - May 25 · Average first frost: Sep 15 - Sep 30

Start Seeds Indoors

6 wks before frost

Transplant Outside

2 wks before frost

Fall Planting

10 wks before first frost

Growing Cauliflower in North Dakota

Cauliflower in North Dakota's Climate

Cauliflower is more demanding than broccoli — it needs steady 60-70°F temperatures during heading, which your unpredictable spring weather may not provide. Fall is the better season: start indoors in mid-June, transplant in mid-July, and let the gradual autumn cool-down produce tight, clean heads. Temperature swings cause buttoning (premature tiny heads).

Soil Considerations for North Dakota

Rich prairie soils — excellent for gardening. Alkaline in western regions. Heavy clay in Red River Valley.

North Dakota Climate & Growing Season

Very cold winters. Short but warm summers with long days. Wind protection very important for gardens.

Growing season length varies across North Dakota: Western North Dakota (3b, 4a) has a last frost around May 15 - May 30, while Eastern North Dakota (3a, 3b, 4a, 4b) sees frost end around May 10 - May 25. This difference matters for cauliflower — adjust your planting dates to match your specific region.

Growing Tips

Blanch white varieties by tying outer leaves over the head when it reaches 2 inches. Temperature swings cause buttoning.

Companion Planting

Plant cauliflower alongside these companions for better growth:

Beets Celery Onions

Keep cauliflower away from:

Strawberries Tomatoes

The Bottom Line

Cauliflower can be grown successfully across North Dakota, but your exact planting dates depend on which region you're in. Western North Dakota gardeners should plan around a May 15 - May 30 last frost, while those in Eastern North Dakota can typically plant earlier. For exact dates based on your zip code, use our free planting date finder.

Note: All dates are based on NOAA 30-year Climate Normals and represent historical averages, not predictions for any specific year. Always check your local weather forecast before planting frost-sensitive crops. Learn about our data sources.

Last reviewed: March 29, 2026