When to Plant Collard Greens in North Dakota (2026 Guide)
If you're looking to grow collard greens in North Dakota, understanding the local frost dates is essential for a successful harvest. In Zone 5b, the median last spring frost occurs on May 12, while the first fall frost typically takes place on September 23. This provides a frost-free growing season of around 134 days, allowing ample time for these nutritious greens to thrive.
Collard greens are a wonderful addition to any home garden, especially in North Dakota, where their cold-hardiness and heat tolerance allow them to flourish. In Zone 5a, which includes areas like Dickinson, the last spring frost falls on May 16, thereby shortening the growing season to about 126 days. Knowing when to plant will help you make the most of this time.
Whether you are planting in Fargo or any other North Dakota city, it’s important to follow the local weather patterns throughout the growing season. These leafy greens are not only delicious but they continue to improve in flavor after the first frost, as their starches transform into sugars. Let’s dive into the best practices for planting and harvesting collard greens in the state.
Planting Schedule by USDA Zone in North Dakota
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 5b | Start February 15 – March 1, ~6–8 weeks before May 12 | Transplant outdoors from May 12 – May 26, after the last frost | Direct sow from May 12 – June 1, once the soil warms | Harvest from mid-July until frost starts in late September |
| Zone 5a | Start February 20 – March 5, ~6–8 weeks before May 16 | Transplant outdoors from May 16 – May 30, once danger of frost has passed | Direct sow from May 16 – June 2, when conditions are right | Harvest from late July until frosts begin in mid-September |
Collard Greens Planting Windows in North Dakota
- Indoor start: Start your collard greens indoors between February 15 and March 1 to get a jump on the season.
- Transplant outdoors: Transplant your collard greens outdoors from May 12 to May 26, right after the last frost date.
- Harvest: You can begin harvesting collard greens from mid-July and continue until the first frosts arrive in late September.
Common Mistakes Growing Collard Greens in North Dakota
- Many new gardeners in North Dakota fail to consider the last frost date, leading to premature planting. If you plant too early and encounter a late frost, you risk losing your collard greens entirely.
- Overwatering is a common mistake in North Dakota, especially during spring. Wet soil can cause collard greens to develop root rot, so ensure you provide adequate drainage and monitor moisture levels regularly.
- In North Dakota, aphid infestations can quickly decimate collard greens. Failing to inspect your plants frequently may result in larger pest issues, making it necessary to act swiftly with appropriate interventions.
- Some gardeners in North Dakota confuse collard greens with other brassicas like kale and cabbage, mistakenly believing they require the same care. Each plant has unique needs, so it’s crucial to research the specific requirements for collard greens.
- A common oversight is harvesting collard greens too late or after they become tough and fibrous. In North Dakota's climate, where conditions can change rapidly, it's essential to harvest leaves when they are 10–12 inches long for optimal tenderness.
Frequently Asked Questions
What if I'm in a cold pocket of North Dakota?
In colder regions of North Dakota, you may want to start your collard greens indoors even earlier, around late January. It helps ensure that your plants are ready to transplant after the last frost.
Can I still plant collard greens in May?
Yes, you can still plant collard greens in May as long as you monitor the last frost date in your area. If you're in Fargo, for example, direct sowing after May 12 is advisable.
How long do collard greens take to grow?
Collard greens generally take about 70 to 90 days from transplanting to reach a size suitable for harvesting. Regularly checking their growth will help you determine the right time for harvesting.
Can I grow collard greens in containers?
Absolutely! Collard greens grow well in containers, just make sure the pot is large enough for root space. Using quality potting soil will also help provide the necessary nutrients for healthy growth.
What pests should I watch for in North Dakota?
In North Dakota, watch out for common pests like aphids and cabbage loopers. Regular inspections, along with preventive measures, can help keep your collard greens healthy and productive.
Keep Learning
City guides in North Dakota
Other crops in North Dakota
Typical fall sowing window for Collard Greens in North Dakota: July 12 – August 2.