When to Plant Kohlrabi in Wyoming (2026 Guide)

Growing kohlrabi in Wyoming can be quite rewarding, given the right timing and techniques. This unique brassica, known for its bulb-like stem that rises just above the soil, is perfect for salads and slaws. In Wyoming, the average last spring frost date varies, with some areas like Cheyenne experiencing it as late as May 12, making it crucial to plan your planting schedule carefully.

Kohlrabi is typically a quick-growing crop, with a time-to-harvest of about 45–60 days from transplanting. Therefore, understanding your local frost dates is essential for sowing seeds and ensuring a bountiful harvest. For example, in Zone 5a, gardeners must consider the median last spring frost on May 27, which affects when to start seeds indoors and transplant outdoors.

As a cool-season crop, kohlrabi thrives best in the temperate weather of spring and early fall. The growing season here may be around 115 to 137 days, depending on your specific location in Wyoming. By timing your planting right, you can maximize your yield and enjoy this crisp, versatile vegetable in your meals throughout the growing season.

Planting Schedule by USDA Zone in Wyoming

Zone	Indoor start	Transplant out	Direct sow	Harvest
Zone 5a	Start seeds indoors from April 1 – April 15, ~6–8 weeks before the last frost on May 27.	Transplant outdoors from May 28 – June 12, after the last frost has passed.	Direct sow seeds from June 1 – June 15 for a fall harvest.	Harvest between July 15 – August 10 for the best flavor and texture.
Zone 5b	Start seeds indoors from March 15 – March 30, ~6–8 weeks before the last frost on May 12.	Transplant outdoors from May 13 – May 28, after the last frost.	Direct sow seeds from June 1 – June 15 for a late summer harvest.	Harvest between July 15 – August 10 for optimal taste.

Kohlrabi Planting Windows in Wyoming

Indoor start: Start seeds indoors from April 1 – April 15 for a successful harvest.
Transplant outdoors: Transplant outdoors from May 13 – May 28 to ensure strong growth after the last frost.
Harvest: Harvest kohlrabi between July 15 – August 10 for the best results.

Common Mistakes Growing Kohlrabi in Wyoming

Many Wyoming gardeners underestimate the impact of late spring frosts. Planting too early before the May 12 or May 27 frost dates can kill young kohlrabi seedlings.
One common mistake is not giving kohlrabi enough water, especially during dry spells in Wyoming. This can lead to tough, woody bulbs that are less enjoyable to eat.
Gardeners often overlook the importance of crop rotation. Planting kohlrabi repeatedly in the same spot each year can lead to soil nutrient depletion and increased pest problems in Wyoming gardens.
Some growers may over-fertilize kohlrabi, thinking it will boost growth. However, excessive nitrogen can result in lush foliage with poor bulb development, particularly under Wyoming's unique growing conditions.
Failing to recognize the right harvest timing can lead to subpar kohlrabi. Waiting too long can result in oversized, fibrous bulbs that lack flavor and texture, which is a mistake many Wyoming gardeners make.

Frequently Asked Questions

What if I'm in a cold pocket of Wyoming?

If you live in a colder area, consider starting seeds indoors earlier or using row covers to protect young plants. This can help you avoid frost damage and extend your growing season for kohlrabi.

Can I still plant kohlrabi in May?

Yes, if you are in Zone 5b and the risk of frost has passed (after May 12), you can plant kohlrabi in May. Make sure to monitor weather forecasts to protect seedlings from late frosts.

How much space does kohlrabi need?

Kohlrabi typically needs about 6 to 12 inches of space between plants. Proper spacing allows for good airflow and helps prevent issues like disease and overcrowding in the garden.

Is kohlrabi frost-tolerant?

Yes, kohlrabi is frost-tolerant and can handle light frosts, making it suitable for early spring and fall planting. However, protecting young plants from harsh conditions is vital for a successful harvest.

What are the best conditions for growing kohlrabi?

Kohlrabi thrives in well-drained, nutrient-rich soil with consistent moisture and cooler temperatures. A sunny location with some protection from extreme heat can enhance its growth and flavor.