Kohlrabi, a cross between a cabbage and a turnip, is a delicious and versatile vegetable that can be enjoyed in a variety of dishes, from salads and slaws to soups and stews. While it’s typically thought of as a cool-season crop, kohlrabi can be overwintered, allowing you to enjoy its unique flavor and texture even in the dead of winter. In this article, we’ll explore the ins and outs of overwintering kohlrabi, including the benefits, challenges, and best practices for success.
Benefits of Overwintering Kohlrabi
Overwintering kohlrabi offers several benefits, including:
- Extended harvest season: By overwintering kohlrabi, you can enjoy a longer harvest season, often from late summer to early spring.
- Improved flavor: Kohlrabi that’s been overwintered tends to have a sweeter, more complex flavor than summer-harvested kohlrabi.
- Increased nutrition: Overwintered kohlrabi is higher in vitamins and minerals, particularly vitamin C and potassium.
- Reduced pests and diseases: Overwintering kohlrabi can help reduce the risk of pests and diseases, as the cold weather and snow cover can help kill off any lingering issues.
Challenges of Overwintering Kohlrabi
While overwintering kohlrabi can be a rewarding experience, there are some challenges to be aware of, including:
- Cold hardiness: Kohlrabi is a cool-season crop, but it’s not as cold-hardy as some other vegetables, such as kale or spinach. It can tolerate light frosts, but prolonged exposure to cold temperatures can damage or kill the plants.
- Moisture: Kohlrabi needs consistent moisture to survive the winter months. If the soil is too dry, the plants may not make it through the winter.
- Pests and diseases: While overwintering kohlrabi can help reduce the risk of pests and diseases, it’s not a guarantee. Keep an eye out for signs of trouble, such as yellowing leaves or soft spots on the stems.
Best Practices for Overwintering Kohlrabi
To successfully overwinter kohlrabi, follow these best practices:
Choosing the Right Variety
Not all kohlrabi varieties are created equal when it comes to overwintering. Look for varieties that are specifically bred for winter production, such as ‘Kolibri’ or ‘Grand Duke’. These varieties tend to be more cold-hardy and have a slower growth rate, making them better suited for overwintering.
Planting at the Right Time
In most regions, it’s best to plant kohlrabi in late summer or early fall, about 8 to 10 weeks before the first frost. This allows the plants to mature before the winter weather sets in.
Providing Protection
Kohlrabi needs protection from extreme cold and wind to survive the winter months. Consider using row covers or cold frames to provide a layer of insulation and protection.
Mulching and Watering
Mulching and watering are crucial for overwintering kohlrabi. Apply a thick layer of organic mulch, such as straw or hay, to the soil to help retain moisture and regulate soil temperature. Water the plants regularly, but avoid overwatering, which can lead to rot and other problems.
Monitoring for Pests and Diseases
Keep an eye out for signs of pests and diseases, such as yellowing leaves or soft spots on the stems. Use organic or integrated pest management (IPM) methods to address any issues that arise.
Overwintering Kohlrabi in Different Regions
Overwintering kohlrabi can be a bit tricky, as the specific techniques and timing will vary depending on your region and climate. Here are some general guidelines for overwintering kohlrabi in different regions:
USDA Hardiness Zones 3-5
In these regions, kohlrabi can be overwintered using a combination of row covers and cold frames. Plant in late summer or early fall, and provide protection from extreme cold and wind.
USDA Hardiness Zones 6-7
In these regions, kohlrabi can be overwintered using row covers or mulch. Plant in late summer or early fall, and provide protection from extreme cold and wind.
USDA Hardiness Zones 8-10
In these regions, kohlrabi can be grown year-round, but it’s still important to provide some protection from extreme heat and cold. Use row covers or shade cloth to provide shade and regulate soil temperature.
Harvesting Overwintered Kohlrabi
Overwintered kohlrabi can be harvested in late winter or early spring, typically around February or March. Use a sharp knife or pruning shears to cut the stems at the base of the plant, leaving a small portion of stem attached to the root.
Using Overwintered Kohlrabi in the Kitchen
Overwintered kohlrabi is delicious raw or cooked, and can be used in a variety of dishes, such as:
- Salads and slaws
- Soups and stews
- Stir-fries and sautés
- Roasted as a side dish
Conclusion
Overwintering kohlrabi is a great way to enjoy this delicious and versatile vegetable year-round. By following the best practices outlined in this article, you can successfully overwinter kohlrabi and enjoy a bountiful harvest in the dead of winter. Whether you’re a seasoned gardener or just starting out, overwintering kohlrabi is definitely worth trying.
| Region | Planting Time | Protection |
|---|---|---|
| USDA Hardiness Zones 3-5 | Late summer or early fall | Row covers and cold frames |
| USDA Hardiness Zones 6-7 | Late summer or early fall | Row covers or mulch |
| USDA Hardiness Zones 8-10 | Year-round | Row covers or shade cloth |
Note: The table provides a summary of the best practices for overwintering kohlrabi in different regions.
What is Overwintering and How Does it Apply to Kohlrabi?
Overwintering refers to the process of allowing a plant to survive the winter season, either by protecting it from harsh weather conditions or by choosing varieties that are naturally more resilient. When it comes to kohlrabi, overwintering is a great way to enjoy this delicious crop year-round. By providing the right conditions and care, you can keep your kohlrabi plants alive and thriving even in the coldest months.
In areas with mild winters, kohlrabi can be left in the ground to overwinter, while in colder climates, it’s best to bring the plants indoors or use other protection methods. With proper care, overwintered kohlrabi can be harvested in early spring, providing a fresh and tasty crop before the new growing season begins.
How Do I Prepare My Kohlrabi for Overwintering?
Preparing your kohlrabi for overwintering involves a few simple steps. First, make sure to choose a variety that is specifically bred for overwintering, as these will be more resistant to cold temperatures. Next, stop fertilizing your kohlrabi plants about a month before the first frost, as this will help them slow down their growth and prepare for the winter.
In areas with harsh winters, it’s also a good idea to mulch around the base of the plants to protect the soil from freezing temperatures. You can use a thick layer of straw or other organic material to keep the soil warm and cozy. Additionally, consider bringing potted kohlrabi plants indoors or moving them to a cold frame to provide extra protection from the elements.
What Are the Best Varieties of Kohlrabi for Overwintering?
When it comes to overwintering kohlrabi, choosing the right variety is crucial. Look for varieties that are specifically bred for their cold hardiness and ability to survive the winter months. Some popular varieties for overwintering include ‘Kolibri’, ‘Grand Duke’, and ‘White Vienna’. These varieties tend to be more compact and have a slower growth rate, making them well-suited for overwintering.
In addition to these specific varieties, you can also look for kohlrabi varieties that are labeled as “winter” or “overwintering” types. These will generally be bred for their ability to survive the cold temperatures and will be a good choice for overwintering. Be sure to check the specific growing conditions and instructions for each variety to ensure the best results.
How Do I Care for My Overwintering Kohlrabi?
Caring for overwintering kohlrabi is relatively simple. Make sure to keep the soil consistently moist, but not waterlogged, as this can lead to root rot. You can also provide some protection from extreme cold snaps by covering the plants with a layer of straw or other organic material.
In areas with mild winters, you can simply leave the kohlrabi plants in the ground and allow them to continue growing slowly. In colder climates, you may need to bring the plants indoors or use other protection methods to keep them alive. Be sure to check on your kohlrabi plants regularly to ensure they are receiving the right amount of moisture and protection.
Can I Grow Kohlrabi in Containers for Overwintering?
Yes, you can definitely grow kohlrabi in containers for overwintering. In fact, this can be a great way to provide extra protection for your plants and keep them alive during the winter months. Choose a container that is at least 6-8 inches deep to provide enough room for the roots to grow.
When growing kohlrabi in containers for overwintering, make sure to use a well-draining potting mix and keep the soil consistently moist. You can also provide some protection from extreme cold snaps by moving the containers to a protected location or covering them with a layer of straw or other organic material.
How Long Does it Take for Overwintered Kohlrabi to Mature?
The time it takes for overwintered kohlrabi to mature will depend on the specific variety and growing conditions. In general, overwintered kohlrabi will take around 60-90 days to mature after the winter. This is because the plants will have slowed down their growth during the winter months and will need some time to recover and start growing again in the spring.
In areas with mild winters, you can expect your overwintered kohlrabi to mature a bit faster, while in colder climates, it may take a bit longer. Be sure to check on your kohlrabi plants regularly to determine when they are ready to harvest.
Can I Use Overwintering Kohlrabi in Cooking and Recipes?
Yes, overwintered kohlrabi is perfect for using in cooking and recipes. The flavor and texture of overwintered kohlrabi are similar to those of freshly harvested kohlrabi, and it can be used in a variety of dishes. You can use overwintered kohlrabi in salads, slaws, soups, and stews, or as a side dish on its own.
One of the benefits of overwintered kohlrabi is that it tends to be sweeter and less bitter than freshly harvested kohlrabi. This makes it a great choice for using in recipes where you want a milder flavor. Be sure to check on your kohlrabi plants regularly to determine when they are ready to harvest and use in your favorite recipes.