When to Plant Kohlrabi in Kansas (2026 Guide)
Kohlrabi is a unique and delicious addition to your garden that thrives in the varied climates of Kansas. With its crisp, juicy texture and sweet broccoli-like flavor, this unusual brassica can be a delightful surprise for your palate. Though often overlooked, kohlrabi is easy to grow and can be harvested just 45 to 60 days after transplanting, making it a great choice for both novice and experienced gardeners.
Kansas offers excellent opportunities for growing kohlrabi, particularly in its frost-free zones. In Zone 6b, like Derby and Emporia, you can expect a median last spring frost around April 9, giving you plenty of time to plant. Meanwhile, in Zone 6a areas such as Dodge City and Junction City, the median last frost is April 20—timing that helps you plan your garden effectively.
Understanding your specific region in Kansas can further enhance your success with kohlrabi. With a frost-free season extending approximately 200 days in Zone 6b and around 177 days in Zone 6a, you have the flexibility to experiment with multiple planting times. Prepare to enjoy fresh kohlrabi well before the first fall frost, which arrives around October 14 in Zone 6a and October 26 in Zone 6b.
Planting Schedule by USDA Zone in Kansas
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Start February 15 – March 1, ~6–8 weeks before April 9 | Transplant outdoors from April 10 – April 30, after the last frost | Direct sow seeds from April 15 – May 15, after the danger of frost | Harvest kohlrabi from June 1 – July 15, when bulbs are about 3 inches in diameter |
| Zone 6a | Start February 25 – March 10, ~6–8 weeks before April 20 | Transplant outdoors from May 1 – May 10, after the last frost | Direct sow seeds from May 5 – May 25, ensuring frost has passed | Harvest kohlrabi from June 15 – July 30, when bulbs reach 3 inches in size |
Kohlrabi Planting Windows in Kansas
- Indoor start: In Kansas, start your kohlrabi seeds indoors from February 15 to March 10, depending on your zone.
- Transplant outdoors: Transplant kohlrabi outdoors from April 10 to May 10 in Kansas to avoid frost damage.
- Harvest: Kohlrabi can be harvested from June 1 to July 30, ensuring you pick them at the right size for optimal flavor.
Common Mistakes Growing Kohlrabi in Kansas
- One common mistake among Kansas gardeners is waiting too long to plant kohlrabi. Missing the optimal window can limit your harvest and lead to a poor crop. Be aware of your local last frost dates to time your planting accurately.
- Kansas gardeners often underestimate the impact of summer heat on kohlrabi growth. When temperatures soar, kohlrabi can become woody. To mitigate this, especially in southern Kansas, try to cover young plants if a heat wave is forecasted to maintain cooler conditions.
- Another frequent oversight is improper harvesting timing. Kohlrabi bulbs should be harvested at about 3 inches in diameter for the best texture and flavor. If left too long, they may exceed 4 inches and turn woody, making them less enjoyable to eat.
- Some growers in Kansas neglect to utilize the kohlrabi greens. Many do not realize that the leafy tops are nutritious and delicious. Incorporate them in stir-fries or salads instead of discarding them to get the most value from your plants.
- Overcrowding is a prevalent issue in Kansas gardens as many gardeners try to maximize space. This can stunt the growth of kohlrabi and cause competition for nutrients. Space your plants appropriately to ensure a healthy, productive crop.
Frequently Asked Questions
What if I'm in a cold pocket of Kansas?
If you're in a colder area of Kansas, consider starting your kohlrabi seeds indoors earlier and transplanting once the soil is warm enough. Adjust planting dates based on local frost patterns to ensure a successful harvest.
Can I still plant kohlrabi in May?
While May isn't ideal, you can still direct sow kohlrabi seeds in early May, especially in Zone 6b. Just keep an eye on the weather to avoid any late frosts before planting.
How should I care for my kohlrabi plants?
Kohlrabi requires consistent moisture, so water them regularly, especially during dry spells. Additionally, provide a balanced fertilizer to support their growth, and keep an eye out for pests like aphids that can affect their development.
Can I grow kohlrabi in containers?
Absolutely! Kohlrabi can thrive in containers if they are deep enough to accommodate their growth. Make sure to use quality potting soil and maintain even watering for the best results.
What is the best way to eat kohlrabi?
Kohlrabi is delicious both raw and cooked. For a fresh snack, peel and slice thinly. You can also roast or braise it for a tasty side dish. Don’t forget to use the leafy greens in salads or stir-fries!
Keep Learning
City guides in Kansas
Other crops in Kansas
Typical fall sowing window for Kohlrabi in Kansas: August 19 – September 9.