Grow Kohlrabi Indoors Easily: A Complete Guide

Grow Kohlrabi Indoors Easily? Absolutely! Imagine harvesting crisp, slightly sweet kohlrabi right from your windowsill, even when the snow is falling outside. Sounds like a dream, right? Well, it’s a dream you can easily make a reality with a few simple tricks and a little DIY spirit. For centuries, gardeners have sought ways to extend their growing seasons, and bringing the garden indoors is a time-honored tradition. While kohlrabi might not be the first vegetable that springs to mind for indoor cultivation, its compact size and relatively quick growth cycle make it a surprisingly rewarding choice.

But why bother learning how to grow kohlrabi indoors easily? Well, for starters, it gives you access to fresh, healthy produce year-round, regardless of your climate. Plus, it’s a fantastic way to combat those winter blues by bringing a touch of green into your home. And let’s be honest, there’s something incredibly satisfying about nurturing a plant from seed to harvest. In this article, I’m going to share my favorite DIY tricks and hacks to help you successfully grow kohlrabi indoors, even if you’re a complete beginner. Get ready to unleash your inner gardener and enjoy the delicious rewards!

Grow Kohlrabi Indoors: A Beginner’s Guide

Hey there, fellow gardening enthusiasts! Ever thought about growing kohlrabi indoors? It’s totally doable, and I’m here to walk you through the whole process. Kohlrabi, with its unique bulbous stem and mild, slightly sweet flavor, is a fantastic addition to salads, stir-fries, or even enjoyed raw. Plus, growing it indoors extends your growing season and gives you fresh veggies even when the weather outside is frightful. Let’s get started!

Choosing the Right Kohlrabi Variety

First things first, not all kohlrabi varieties are created equal when it comes to indoor growing. You’ll want to pick varieties that are known for their compact size and relatively quick maturity. Here are a few of my favorites:

• Early White Vienna: This is a classic choice, known for its early maturity and mild flavor. It’s a reliable option for beginners.
• Early Purple Vienna: Similar to the white variety, but with a beautiful purple hue. It adds a pop of color to your garden and your plate!
• Grand Duke: This variety is known for its disease resistance and relatively large bulbs, even when grown in containers.

Gathering Your Supplies

Okay, before we dive into the planting process, let’s make sure we have everything we need. Here’s a checklist:

• Kohlrabi Seeds: Choose your preferred variety from the list above. Make sure they are fresh for the best germination rates.
• Seed Starting Trays or Small Pots: These will be used to start your kohlrabi seedlings. I prefer using seed starting trays with a humidity dome to help retain moisture.
• Potting Mix: Use a high-quality, well-draining potting mix. Avoid using garden soil, as it can be too heavy and compact for container gardening.
• Larger Pots (at least 6 inches in diameter): Once your seedlings are big enough, you’ll need to transplant them into larger pots.
• Grow Lights: Kohlrabi needs plenty of light to thrive. If you don’t have a sunny windowsill, invest in a good set of grow lights.
• Watering Can or Spray Bottle: For gentle watering.
• Fertilizer: A balanced liquid fertilizer will help your kohlrabi plants grow strong and healthy.
• Optional: Heat Mat: A heat mat can help speed up germination, especially in cooler environments.

Starting Your Kohlrabi Seeds

This is where the magic begins! We’re going to start by germinating our kohlrabi seeds.

1. Prepare Your Seed Starting Trays: Fill your seed starting trays or small pots with potting mix. Gently press down the soil to create a firm surface.
2. Sow the Seeds: Sow 2-3 kohlrabi seeds per cell or pot, about ¼ inch deep.
3. Water Gently: Water the soil gently using a watering can or spray bottle. You want to moisten the soil without disturbing the seeds.
4. Cover and Provide Warmth: If you’re using a seed starting tray with a humidity dome, cover it. If not, you can loosely cover the trays with plastic wrap. Place the trays on a heat mat (optional) or in a warm location. The ideal temperature for germination is between 65-75°F (18-24°C).
5. Monitor Germination: Keep the soil consistently moist, but not soggy. You should see seedlings emerge in about 5-10 days.

Caring for Your Kohlrabi Seedlings

Once your seedlings have emerged, it’s time to provide them with the care they need to grow into healthy plants.

1. Provide Adequate Light: Once the seedlings emerge, remove the humidity dome or plastic wrap. Place the trays under grow lights or in a sunny windowsill. If using grow lights, keep them about 2-4 inches above the seedlings and provide 12-16 hours of light per day.
2. Thin the Seedlings: Once the seedlings have their first true leaves (the second set of leaves that appear after the initial seed leaves), thin them to one seedling per cell or pot. Choose the strongest, healthiest-looking seedling and gently snip off the others at the soil line.
3. Water Regularly: Water the seedlings when the top inch of soil feels dry to the touch. Avoid overwatering, as this can lead to root rot.
4. Fertilize: Start fertilizing your seedlings with a diluted liquid fertilizer about 2 weeks after they emerge. Follow the instructions on the fertilizer label for the correct dilution rate.

Transplanting Your Kohlrabi Seedlings

When your seedlings are about 3-4 inches tall and have a few sets of true leaves, it’s time to transplant them into larger pots.

1. Prepare Your Larger Pots: Fill your larger pots (at least 6 inches in diameter) with potting mix.
2. Gently Remove the Seedlings: Carefully remove the seedlings from their seed starting trays or small pots. Be gentle to avoid damaging the roots.
3. Plant the Seedlings: Plant one seedling per pot, making sure the top of the root ball is level with the soil surface.
4. Water Thoroughly: Water the newly transplanted seedlings thoroughly.
5. Provide Support (Optional): If your kohlrabi plants start to get top-heavy, you can provide them with support by staking them with bamboo stakes or plant supports.

Ongoing Care for Indoor Kohlrabi Plants

Now that your kohlrabi plants are in their larger pots, it’s important to provide them with the ongoing care they need to thrive.

1. Light: Kohlrabi needs at least 6 hours of direct sunlight per day. If you don’t have a sunny windowsill, continue to use grow lights.
2. Watering: Water your kohlrabi plants regularly, keeping the soil consistently moist but not soggy. Check the soil moisture regularly and water when the top inch feels dry.
3. Fertilizing: Continue to fertilize your kohlrabi plants every 2-3 weeks with a balanced liquid fertilizer.
4. Temperature: Kohlrabi prefers cooler temperatures, ideally between 60-70°F (15-21°C). Avoid placing your plants near heat sources or in areas with extreme temperature fluctuations.
5. Air Circulation: Good air circulation is important to prevent fungal diseases. Make sure your plants have adequate space between them and consider using a small fan to improve air flow.
6. Pest Control: Keep an eye out for common pests like aphids, cabbage worms, and flea beetles. If you spot any pests, treat them with an appropriate organic insecticide or insecticidal soap.

Harvesting Your Kohlrabi

The best part! You’ll know your kohlrabi is ready to harvest when the bulbous stem reaches about 2-3 inches in diameter. This usually takes about 45-60 days from planting, depending on the variety and growing conditions.

1. Harvesting: To harvest your kohlrabi, simply cut the stem just above the soil line with a sharp knife.
2. Storage: Store your harvested kohlrabi in the refrigerator for up to a week.

Troubleshooting Common Problems

Even with the best care, you might encounter a few challenges along the way. Here are some common problems and how to address them:

• Leggy Seedlings: This is usually caused by insufficient light. Make sure your seedlings are getting enough light, either from a sunny windowsill or grow lights.
• Yellowing Leaves: This could be a sign of overwatering, underwatering, or nutrient deficiency. Check the soil moisture and adjust your watering schedule accordingly. If the leaves are yellowing due to nutrient deficiency, fertilize your plants with a balanced liquid fertilizer.
• Root Rot: This is caused by overwatering and poor drainage. Make sure your pots have drainage holes and avoid overwatering. If you suspect root rot, you can try transplanting your plant into fresh potting mix.
• Pests: Keep an eye out for common pests like aphids, cabbage worms, and flea beetles. Treat them with an appropriate organic insecticide or insecticidal soap.

Enjoying Your Homegrown Kohlrabi

Congratulations! You’ve successfully grown kohlrabi indoors. Now it’s time to enjoy the fruits (or rather, stems) of your labor. Kohlrabi can be eaten raw, cooked, or pickled. Here are a few ideas:

• Raw: Peel the kohlrabi

  

  Conclusion

  So, there you have it! Growing kohlrabi indoors doesn’t have to be a daunting task. With a little planning, the right setup, and consistent care, you can enjoy fresh, homegrown kohlrabi even when the weather outside isn’t cooperating. This DIY trick is a must-try for several reasons. First, it extends your growing season, allowing you to harvest kohlrabi earlier in the spring or later in the fall. Second, it gives you greater control over the growing environment, protecting your plants from pests, diseases, and unpredictable weather conditions. Third, it’s incredibly rewarding to nurture a plant from seed to harvest, especially when you get to enjoy the delicious, crisp, and slightly sweet flavor of homegrown kohlrabi.

  But the benefits don’t stop there. Growing kohlrabi indoors also offers a fantastic opportunity to experiment with different varieties. Why not try growing ‘Early White Vienna’ for its mild flavor, or ‘Purple Vienna’ for its striking color and slightly more robust taste? You could even explore some of the newer cultivars that are specifically bred for container gardening.

  For those looking to take their indoor kohlrabi growing to the next level, consider these variations:

  * Hydroponics: If you’re feeling adventurous, try growing your kohlrabi hydroponically. This soilless method can lead to faster growth and higher yields.
  * Succession Planting: Plant new seeds every few weeks to ensure a continuous harvest throughout the growing season.
  * Companion Planting: Grow kohlrabi alongside other beneficial plants, such as marigolds (to deter pests) or herbs like dill (to attract beneficial insects).

  Ultimately, the best way to discover the joys of growing kohlrabi indoors is to simply give it a try. Don’t be afraid to experiment, learn from your mistakes, and adapt your approach as needed. Remember, every gardener has their own unique style and preferences.

  We’re confident that you’ll find this DIY trick to be a valuable addition to your gardening repertoire. So, grab some seeds, gather your supplies, and get ready to enjoy the satisfaction of harvesting your own homegrown kohlrabi.

  We’d love to hear about your experiences! Share your tips, tricks, and photos in the comments below. Let’s create a community of indoor kohlrabi growers and learn from each other. Happy gardening!

  Frequently Asked Questions (FAQ)

  What are the ideal growing conditions for kohlrabi indoors?

  Kohlrabi thrives in cool temperatures, ideally between 60-70°F (15-21°C). They need at least 6 hours of direct sunlight per day, or 12-14 hours of artificial light from grow lights. Use a well-draining potting mix and keep the soil consistently moist, but not waterlogged. Good air circulation is also important to prevent fungal diseases.

  How long does it take to grow kohlrabi indoors?

  From seed to harvest, kohlrabi typically takes 6-8 weeks to mature indoors. This can vary depending on the variety, growing conditions, and your specific setup. Keep a close eye on your plants and harvest the bulbs when they reach the desired size, usually around 2-3 inches in diameter.

  What size container should I use for growing kohlrabi indoors?

  A container that is at least 6-8 inches deep and wide is sufficient for growing one kohlrabi plant. Larger containers are always better, as they provide more room for the roots to grow and help retain moisture. You can also grow multiple kohlrabi plants in a larger container, spacing them about 6 inches apart.

  What type of grow lights are best for kohlrabi?

  LED grow lights are a great option for growing kohlrabi indoors, as they are energy-efficient and provide a full spectrum of light that plants need to thrive. Fluorescent grow lights are also a viable option, but they may not be as efficient as LEDs. Make sure to position the grow lights close enough to the plants (usually 6-12 inches) to provide adequate light intensity.

  How often should I water kohlrabi plants indoors?

  Water your kohlrabi plants regularly, keeping the soil consistently moist but not waterlogged. Check the soil moisture level daily by sticking your finger about an inch into the soil. If the soil feels dry, it’s time to water. Avoid overwatering, as this can lead to root rot.

  What are some common pests and diseases that affect kohlrabi?

  Common pests that can affect kohlrabi include aphids, cabbage worms, and flea beetles. You can control these pests by handpicking them off the plants, using insecticidal soap, or applying neem oil. Common diseases that can affect kohlrabi include clubroot and downy mildew. To prevent these diseases, ensure good air circulation, avoid overwatering, and use disease-resistant varieties.

  How do I know when my kohlrabi is ready to harvest?

  Kohlrabi is typically ready to harvest when the bulb reaches 2-3 inches in diameter. The bulb should be firm and smooth. You can harvest kohlrabi by cutting the stem just above the bulb. The leaves are also edible and can be harvested at any time.

  Can I grow kohlrabi indoors year-round?

  Yes, you can grow kohlrabi indoors year-round, as long as you provide the right growing conditions. This includes adequate light, temperature, and moisture. You may need to adjust your watering and fertilizing schedule depending on the season.

  What kind of fertilizer should I use for kohlrabi?

  Use a balanced fertilizer with equal amounts of nitrogen, phosphorus, and potassium (e.g., 10-10-10) to fertilize your kohlrabi plants. You can also use a fertilizer that is specifically formulated for vegetables. Fertilize your plants every 2-3 weeks, following the instructions on the fertilizer label.

  Is it necessary to thin kohlrabi seedlings?

  Yes, it is important to thin kohlrabi seedlings to ensure that each plant has enough space to grow. Thin the seedlings when they are about 2 inches tall, leaving only the strongest and healthiest plants. Space the plants about 6 inches apart.

  Can I transplant kohlrabi seedlings that I started indoors?

  Yes, you can transplant kohlrabi seedlings that you started indoors to your outdoor garden. Harden off the seedlings for a week or two before transplanting them, gradually exposing them to outdoor conditions. Transplant the seedlings in a sunny location with well-draining soil.

  What are the nutritional benefits of kohlrabi?

  Kohlrabi is a nutritious vegetable that is rich in vitamins, minerals, and fiber. It is a good source of vitamin C, potassium, and vitamin B6. It is also low in calories and fat.

  How do I store kohlrabi after harvesting?

  Store kohlrabi in the refrigerator for up to several weeks. Remove the leaves before storing, as they can draw moisture from the bulb. You can also freeze kohlrabi for longer storage.

  What are some ways to use kohlrabi in cooking?

  Kohlrabi can be eaten raw or cooked. It can be used in salads, slaws, soups, stews, and stir-fries. The leaves can also be eaten raw or cooked, similar to spinach or kale. The bulb can be roasted, grilled, or steamed.

  What if my kohlrabi bulb doesn’t form properly?

  Several factors can contribute to a kohlrabi bulb not forming properly. Insufficient sunlight, improper watering, or nutrient deficiencies can all play a role. Ensure your plants are receiving adequate light (at least 6 hours of direct sunlight or 12-14 hours of artificial light), water consistently to keep the soil moist but not waterlogged, and fertilize regularly with a balanced fertilizer. Also, make sure you are harvesting at the right time; leaving the bulb on the plant for too long can cause it to become woody and less palatable.