Welcome to the world of Kohlrabi planting, where you’ll discover the joys of cultivating this unique and nutritious vegetable. Kohlrabi, with its distinctive appearance and delicious taste, is a fantastic addition to any garden. In this guide, we will walk you through the process of planting Kohlrabies, providing you with the knowledge and skills needed to grow these crunchy delights in your own backyard.

Understanding Kohlrabies

What Are Kohlrabies?

Kohlrabi, scientifically known as Brassica oleracea var. gongylodes, is a member of the Brassicaceae family, which includes cabbage, broccoli, and kale. This vegetable is renowned for its bulbous, above-ground stem, which resembles a turnip or radish. Kohlrabi, however, has a milder and sweeter flavor than its relatives, making it a popular choice among gardeners and chefs alike.

Kohlrabi has a rich history, with its origins traced back to Europe, particularly the Mediterranean region. It has been cultivated for centuries and gained popularity for its versatility in cooking. The name “Kohlrabi” is derived from the German words “kohl,” meaning cabbage, and “rabi,” meaning turnip, highlighting its resemblance to both vegetables.

This unique vegetable is not only valued for its taste but also for its impressive nutritional profile. It is an excellent source of vitamins, particularly vitamin C and vitamin B6, as well as essential minerals like potassium. Kohlrabi also contains dietary fiber, which aids in digestion and promotes overall gut health.

Varieties of Kohlrabies

Kohlrabi comes in various varieties, each offering its own unique characteristics and adaptability to different growing conditions. Here are some common Kohlrabi varieties:

1. Early White Vienna: This is one of the most popular varieties, known for its early maturity and tender, sweet bulbs. Early White Vienna is an excellent choice for those looking to harvest Kohlrabi quickly.
2. Purple Vienna: As the name suggests, this variety has striking purple skin with white flesh. It has a slightly spicier flavor compared to the white varieties and is prized for its vibrant appearance.
3. Kolibri: Kolibri Kohlrabi produces uniform, round bulbs with a smooth texture. It is resistant to bolting and well-suited for both early and late-season planting.
4. Superschmelz: Superschmelz Kohlrabi is known for its extra-large bulbs, making it a great choice for gardeners seeking a substantial harvest. It has a mild, sweet taste and maintains its tenderness even when the bulbs grow larger.
5. Purple Delicacy: This unique variety has deep purple skin and flesh with a sweet and nutty flavor. Purple Delicacy Kohlrabi is a favorite for adding color to salads and dishes.

When choosing a Kohlrabi variety to plant, consider your climate, soil type, and personal taste preferences. Different varieties may perform better in specific conditions, so selecting the right one for your garden is essential for a successful harvest.

Pre-Planting Preparation Of Kohlrabies

Now that you’re familiar with what Kohlrabies are, it’s time to delve into the essential pre-planting preparations to ensure a thriving Kohlrabi garden.

When to Plant Kohlrabies

Knowing the ideal planting times for Kohlrabies is crucial for their successful growth. Planting times can vary depending on your climate zone and local conditions.

• Cool Season Crop: Kohlrabies are cool-season vegetables, which means they thrive in cooler temperatures. In most regions, you can plant them in early spring as soon as the soil can be worked. However, Kohlrabies can also be grown in the fall for a late-season harvest.
• Climate Zones: The timing for planting Kohlrabies may differ based on your climate zone. In zones with milder winters, such as USDA zones 7-10, you can plant them in the late summer or early fall for a winter harvest. For colder zones, spring planting is preferable.
• Succession Planting: To extend your Kohlrabi harvest, consider succession planting every few weeks. This way, you can enjoy a continuous supply of fresh Kohlrabies throughout the growing season.

Choosing the Right Location

Selecting the right location for your Kohlrabi garden is essential for their growth and development. Here are factors to consider:

• Sunlight: Kohlrabies thrive in full sun, which means they should receive at least 6-8 hours of direct sunlight daily. Ensure your chosen location provides adequate sunlight for optimal growth.
• Well-Drained Soil: Kohlrabies prefer well-drained, loose soil that doesn’t become waterlogged. Avoid low-lying areas or places with poor drainage to prevent root rot.
• Spacing: Adequate spacing between Kohlrabi plants is crucial. Follow the recommended spacing guidelines on the seed packet or plant label to prevent overcrowding, which can lead to stunted growth.
• Protection from Wind: Strong winds can damage Kohlrabi plants, so consider planting them in a location protected from harsh gusts. Installing windbreaks or planting them near taller plants can provide shelter.
• Proximity to Water Source: Ensure your garden is conveniently located near a water source. Kohlrabies require consistent moisture, and easy access to water will make it easier to keep them well-hydrated.

Soil Preparation

Proper soil preparation is vital to create the ideal growing environment for Kohlrabies. Here’s what you need to do:

• Soil Composition: Kohlrabies thrive in well-drained, loamy soil that is rich in organic matter. Before planting, test your soil’s composition to determine its pH level and nutrient content. The ideal pH range for Kohlrabies is between 6.0 and 7.0.
• Enriching the Soil: If your soil lacks organic matter or is not within the recommended pH range, you can amend it by adding compost or well-rotted manure. This will improve soil fertility and texture, providing a better environment for Kohlrabi roots.
• Tilling and Bed Preparation: Prepare planting beds by tilling the soil to a depth of 8-10 inches. Remove any rocks, debris, or weeds that can hinder Kohlrabi growth. Rake the soil to create a smooth, level surface for planting.

By carefully selecting the right location and preparing your soil, you’ll set the stage for healthy and thriving Kohlrabi plants. In the next section, we’ll explore the detailed planting process to get your Kohlrabi seeds or transplants in the ground successfully.

Planting Process Of Kohlrabies

Now that you’ve prepared your garden and are ready to get your hands dirty, let’s dive into the essential steps of planting Kohlrabies to ensure a successful harvest.

Seed Kohlrabies: Selection and Preparation

Choosing Healthy Seed Kohlrabies:

Selecting quality Kohlrabi seeds is the first step to a successful harvest. Here’s how to choose the best seeds:

1. Purchase from Reputable Suppliers: Buy your Kohlrabi seeds from trusted suppliers or nurseries known for their quality seeds. Look for certified organic options if you prefer to grow organically.
2. Check the Expiry Date: Examine the seed packet for the “packaged for” or “use by” date. Fresher seeds generally have a higher germination rate, so choose seeds within their viability period.
3. Variety Selection: Consider the variety of Kohlrabi you want to grow. Some popular varieties include Early White Vienna, Purple Vienna, and Gigante. Choose a variety that suits your climate and taste preferences.
4. Read Reviews and Recommendations: Online reviews or local gardening groups can provide insights into which Kohlrabi varieties perform well in your region.

Cutting and Curing Seed Kohlrabies:

Once you’ve chosen your Kohlrabi seeds, you may want to perform some additional steps to enhance their germination:

1. Scarification: Some gardeners lightly scarify Kohlrabi seeds by rubbing them on fine sandpaper or a nail file to help break the seed coat. This can promote quicker germination.
2. Soaking: Soaking seeds in water for a few hours or overnight can also encourage germination. Make sure to drain and rinse them thoroughly before planting.

Step-by-Step Planting Guide

Now that you have your seeds ready, let’s go through the step-by-step planting process for Kohlrabies:

1. Soil Preparation:

• Ensure your garden bed is well-prepared, as discussed in the previous section, with loose, well-drained soil enriched with organic matter.

2. Planting Depth and Spacing:

• Kohlrabi seeds should be planted about ¼ to ½ inch deep in rows. Space the rows about 12 to 18 inches apart to allow enough room for the mature Kohlrabi bulbs.
• For optimal spacing between individual seeds, aim for 3 inches apart. You can thin the seedlings later to achieve the recommended final spacing of 6-8 inches between plants.

3. Planting Seeds:

• Place the seeds in the prepared furrows or holes, ensuring they are evenly spaced and covered with soil. Press the soil gently to ensure good seed-to-soil contact.

4. Watering:

• After planting, water the soil thoroughly to settle it around the seeds. Keep the soil consistently moist but not waterlogged during the germination period.

5. Germination:

• Kohlrabi seeds typically germinate within 5-7 days when kept in the ideal temperature range of 60-75°F (15-24°C). You’ll start to see the seedlings emerge from the soil.

6. Thinning:

• Once the seedlings have two to three true leaves, thin them to the final recommended spacing (6-8 inches apart). Snip or gently pull out the excess seedlings, leaving the healthiest ones in place.

By following these steps and taking care during the germination and thinning process, you’ll establish a strong foundation for your Kohlrabi plants to thrive. In the next section, we’ll discuss the care and maintenance required as your Kohlrabies continue to grow.

Caring for Kohlrabi Plants

Now that your Kohlrabi seedlings are growing strong, it’s time to focus on their care and maintenance to ensure a bountiful harvest. In this section, we’ll cover essential aspects of caring for your Kohlrabi plants.

Watering Your Kohlrabies

Watering is a critical aspect of Kohlrabi care, as maintaining proper moisture levels is key to healthy growth and well-formed bulbs. Here are the best practices for watering your Kohlrabies:

1. Consistent Moisture: Kohlrabi plants prefer consistently moist soil. Ensure that the soil remains evenly damp but not waterlogged. Aim for approximately 1-1.5 inches of water per week, either through rainfall or manual watering.
2. Deep Watering: It’s better to water deeply and less frequently rather than shallow, frequent watering. Deep watering encourages the development of strong root systems.
3. Mulching: Apply a layer of organic mulch around your Kohlrabi plants to help retain soil moisture, reduce weed competition, and maintain even soil temperatures.
4. Avoid Overhead Watering: Water at the base of the plants to prevent foliage from staying wet, which can lead to fungal diseases. Drip irrigation or soaker hoses are ideal for this purpose.
5. Monitor Soil Moisture: Regularly check the moisture level of the soil by inserting your finger into the soil up to your knuckle. If it feels dry at this depth, it’s time to water.

Fertilizing and Soil Management

Proper fertilization and soil management are essential to provide your Kohlrabi plants with the necessary nutrients for growth. Here’s what you need to know:

1. Soil Testing: Conduct a soil test to determine the nutrient levels and pH of your soil. Kohlrabi prefers slightly acidic soil with a pH between 6.0 and 6.8. Adjust the pH if needed with lime or sulfur.
2. Fertilizer Type: Use a balanced, all-purpose fertilizer with equal NPK (Nitrogen, Phosphorus, Potassium) ratios or a fertilizer labeled specifically for brassicas. Apply according to the manufacturer’s instructions.
3. Application Schedule: Apply fertilizer when planting and then follow up with side-dressings every 3-4 weeks during the growing season. Avoid excessive nitrogen, as it can lead to lush foliage at the expense of bulb development.
4. Organic Matter: Continually improve your soil’s health by incorporating organic matter, such as compost or well-rotted manure. This enhances soil structure and nutrient availability.
5. Microbial Activity: Encourage beneficial soil microbes by avoiding excessive chemical fertilizers and using organic amendments. These microbes help break down organic matter and release nutrients.

Pest and Disease Management For Kohlrabies

Kohlrabies, like other brassicas, are susceptible to various pests and diseases. Here are common issues and organic control methods:

Common Pests:

• Aphids: Blast aphids off with a strong stream of water or introduce natural predators like ladybugs.
• Cabbage Worms: Handpick caterpillars and use floating row covers to prevent their access.
• Flea Beetles: Apply neem oil or use row covers to protect young plants from flea beetles.

Common Diseases:

• Clubroot: Rotate crops, improve drainage, and use clubroot-resistant varieties.
• Downy Mildew: Apply copper-based fungicides as a preventive measure.
• Powdery Mildew: Prune overcrowded foliage to improve air circulation and apply neem oil.

By following these care guidelines and promptly addressing any issues, you’ll be well on your way to a successful Kohlrabi harvest. In the next section, we’ll discuss the optimal timing and techniques for harvesting your Kohlrabies.

Harvesting and Storage Of Kohlrabies

Your Kohlrabi plants have grown to maturity, and it’s time to harvest the delicious bulbs you’ve been eagerly waiting for. In this section, we’ll discuss when and how to harvest Kohlrabies, along with best practices for storing them to maintain freshness.

When and How to Harvest Kohlrabies

Signs that Kohlrabies are ready for harvest:

1. Size: Kohlrabies are typically ready for harvest when they reach 2-3 inches in diameter. However, some varieties may grow larger without sacrificing quality. Check the specific recommendations for the variety you’re growing.
2. Texture: Gently squeeze the bulb. It should feel firm and solid. Overripe Kohlrabies may become woody or pithy, so harvesting at the right size is crucial.
3. Glossy Skin: Mature Kohlrabies have smooth, glossy skin without cracks or blemishes.

Step-by-step harvesting process:

1. Use a Knife or Pruners: To avoid damaging the plant, use a sharp knife or pruners to cut the Kohlrabi stems about 1 inch above the bulb.
2. Remove Leaves: Trim the leaves and stems from the bulb, leaving only a small collar of leaves attached.
3. Clean and Rinse: Rinse the harvested Kohlrabies with water to remove any soil or debris.

Storing Your Kohlrabies

Proper storage is essential to keep your harvested Kohlrabies fresh and flavorful for an extended period. Here are some best practices:

1. Refrigeration: Kohlrabies can be stored in the refrigerator for up to two weeks. Place them in a perforated plastic bag or a vegetable crisper drawer to maintain humidity.
2. Remove Leaves: Before storing, remove the leaves completely, as they can draw moisture from the bulbs.
3. Temperature and Humidity: Store Kohlrabies at a temperature between 32°F and 35°F (0°C and 2°C) with high humidity. If you don’t have a high-humidity drawer, consider placing a damp cloth or paper towel in a plastic bag with the Kohlrabies to maintain moisture.
4. Ventilation: Ensure good air circulation in your refrigerator to prevent moisture buildup, which can lead to rot.
5. Freezing: Kohlrabies can be blanched and frozen for longer-term storage. Cut them into slices or cubes, blanch for a few minutes, cool quickly, drain, and store in airtight freezer bags.
6. Check Regularly: Periodically inspect your stored Kohlrabies for any signs of spoilage or decay. Remove any affected bulbs to prevent them from affecting the others.

By following these guidelines, you can enjoy the crisp, mild flavor of Kohlrabies in various culinary delights throughout the storage period. In the next section, we’ll address common issues that may arise during Kohlrabi cultivation and how to troubleshoot them effectively.

Troubleshooting Common Issues In Kohlrabies Plants

Kohlrabi is a relatively easy-to-grow vegetable, but like any crop, it can face its fair share of challenges. In this section, we’ll address some common issues encountered while growing Kohlrabies and offer solutions to help you tackle these problems effectively.

1. Pest Infestations:

Common Pests: Aphids, cabbage worms, flea beetles, and slugs are some of the common pests that can target Kohlrabi plants.

Solution:

• Hand-Picking: Inspect your plants regularly and remove any pests you find by hand.
• Natural Predators: Encourage natural predators like ladybugs and parasitic wasps.
• Neem Oil or Insecticidal Soap: Use neem oil or insecticidal soap to control aphids and other soft-bodied insects.
• Row Covers: Cover your Kohlrabi plants with row covers early in the season to prevent pest infestations.

2. Disease Problems:

Common Diseases: Kohlrabies can be susceptible to diseases such as clubroot, powdery mildew, and downy mildew.

Solution:

• Crop Rotation: Practice crop rotation to prevent the buildup of disease in the soil.
• Fungicides: In severe cases, use fungicides approved for vegetable use, following the manufacturer’s instructions.
• Well-Drained Soil: Ensure proper drainage to reduce the risk of root diseases like clubroot.
• Proper Spacing: Adequate spacing between plants promotes air circulation and reduces the risk of mildew.

3. Bolting:

Issue: Kohlrabi plants sometimes bolt, or prematurely produce flowers and seeds, especially in high temperatures or when exposed to stress.

Solution:

• Proper Timing: Plant Kohlrabies in the appropriate season for your climate to avoid high temperatures.
• Consistent Moisture: Maintain consistent soil moisture to prevent stress on the plants.
• Harvest Early: Harvest Kohlrabi bulbs when they reach the appropriate size to prevent bolting.

4. Inadequate Growth:

Issue: Slow or stunted growth of Kohlrabi can be due to poor soil conditions, lack of nutrients, or overcrowding.

Solution:

• Soil Testing: Test your soil and amend it with the necessary nutrients.
• Spacing: Ensure proper spacing between plants to avoid overcrowding.
• Fertilization: Apply a balanced fertilizer, following recommended guidelines.

5. Weather Extremes:

Issue: Unusually hot or cold weather can stress Kohlrabi plants and affect their growth.

Solution:

• Mulching: Apply mulch to regulate soil temperature and moisture.
• Shade Cloth: Provide shade during extreme heat with shade cloth or row covers.
• Cold Protection: Use row covers or cloths to protect plants during cold snaps.

By addressing these common issues promptly and applying the suggested solutions, you can maximize the success of your Kohlrabi cultivation. In the next section, we’ll recap the guide and encourage readers to try planting their own Kohlrabies.

Conclusion

In conclusion, growing Kohlrabies can be a rewarding and straightforward experience, even for beginners. With the right knowledge and guidance, you can enjoy the fresh, crisp taste of homegrown Kohlrabi in your salads, stir-fries, or simply as a crunchy snack. Let’s recap the key points from our easy step-by-step guide:

• Understanding Kohlrabies: We provided insights into the history, botany, and various varieties of Kohlrabi, helping you choose the best ones for your garden.
• Pre-Planting Preparation: We discussed when to plant Kohlrabies, selecting the right location, and soil preparation to set the stage for healthy growth.
• Planting Process: Our step-by-step planting guide covered everything from selecting and preparing seeds to planting depth and spacing.
• Caring for Kohlrabies: We explored essential aspects like watering, fertilizing, soil management, and pest and disease control.
• Harvesting and Storage: Learn when and how to harvest Kohlrabies and best practices for storing them to prolong their freshness.
• Troubleshooting: In case of common issues like pests, diseases, bolting, or slow growth, we offered practical solutions.

Now that you have the knowledge and guidance to grow your own Kohlrabies successfully, we encourage you to embark on this gardening journey. Whether you’re an experienced gardener or a novice, the satisfaction of harvesting your own produce is incomparable.

FAQs (Frequently Asked Questions)

Here are some common questions about planting Kohlrabies, along with their answers:

Q1: When is the best time to plant Kohlrabies?
A1: The ideal time to plant Kohlrabies depends on your climate zone. In general, you can plant them in the early spring or late summer for a fall harvest.

Q2: How deep should I plant Kohlrabi seeds?
A2: Plant Kohlrabi seeds about ¼ to ½ inch deep in well-prepared soil.

Q3: Can I grow Kohlrabies in containers?
A3: Yes, you can grow Kohlrabies in containers as long as the containers are deep enough to accommodate their root systems.

Q4: How do I prevent pests from damaging my Kohlrabies?
A4: You can use row covers, natural predators, neem oil, or insecticidal soap to prevent and manage common pests.

Q5: What are the signs that Kohlrabies are ready to harvest?
A5: Kohlrabies are typically ready to harvest when they reach 2-3 inches in diameter. They should be firm, and the skin should be smooth.

Call to Action

We would love to hear about your experiences with planting Kohlrabies or any questions you may have. Share your stories, challenges, or insights in the comments section below.

Thank you for joining us on this gardening journey, and we wish you a successful and enjoyable Kohlrabi-growing experience!