How to Grow Kohlrabi in Alabama

Kohlrabi, often referred to as the “turnip cabbage,” is a unique vegetable that belongs to the Brassica family, which also includes broccoli, cabbage, and kale. With its crisp texture and mildly sweet flavor, kohlrabi has become increasingly popular among home gardeners and chefs alike. If you’re looking to grow this versatile veggie in Alabama, this guide will provide you with everything you need to know—from soil preparation to harvest.

Understanding Kohlrabi

Before diving into the planting and growing process, it’s essential to understand what kohlrabi is. The edible part of the plant is a swollen stem that forms above ground, resembling a bulb. It can be green or purple and can be eaten raw in salads, pickled, or cooked in various dishes.

Nutritional Benefits

Kohlrabi is not only delicious but also packed with nutrients. It’s low in calories and high in vitamins C and K, fiber, and antioxidants. This makes it an excellent addition to a healthy diet.

Ideal Growing Conditions for Kohlrabi

Climate

Alabama’s climate can be both a blessing and a challenge for growing kohlrabi. The state generally falls under USDA Hardiness Zones 7b to 8a, which means it has hot summers and mild winters. Kohlrabi thrives best in cooler weather, making spring and fall the ideal seasons for planting.

Soil Requirements

Kohlrabi prefers well-draining soil rich in organic matter. Aim for soil with a pH between 6.0 and 7.0. To prepare your garden bed:

1. Choose a location: Select a spot that receives at least 6 hours of sunlight per day.
2. Test the soil: Conduct a soil test to determine pH levels and nutrient content.
3. Amend the soil: If necessary, amend your soil with compost or aged manure to improve its fertility and structure.

Watering Needs

Kohlrabi requires consistent moisture for optimal growth. The soil should remain evenly moist but not waterlogged. A good rule of thumb is to water when the top inch of soil feels dry.

Planting Kohlrabi

Seed Selection

Choose varieties suited for your region. Some popular kohlrabi varieties include:

• White Vienna: A classic variety with tender white bulbs.
• Purple Vienna: Known for its striking purple skin and sweet flavor.
• Giant Purple: A larger variety that can grow quite big without losing taste.

Planting Time

In Alabama, you can sow kohlrabi seeds directly into the garden in early spring (March to April) or late summer (August to September) for a fall harvest.

Sowing Seeds

1. Seed depth: Sow seeds about ½ inch deep.
2. Spacing: Space seeds approximately 4–6 inches apart in rows that are 12–18 inches apart.
3. Thinning: Once seedlings emerge (usually within 7–14 days), thin them to stand 6–8 inches apart for optimal growth.

Caring for Kohlrabi

Fertilization

Kohlrabi benefits from regular feeding during its growing season:

1. Initial fertilization: Use a balanced fertilizer at planting time.
2. Mid-season feeding: Apply a nitrogen-rich fertilizer once plants are established.

Weeding

Keep your kohlrabi patch free from weeds, which can compete for nutrients and water. Hand-pulling or hoeing is often effective; however, be cautious not to disturb the shallow roots of your kohlrabi plants.

Pest Control

Kohlrabi can be susceptible to pests like aphids, cabbage worms, and flea beetles. Here are some strategies for managing these pests:

• Hand-picking: Regularly inspect plants and remove any visible pests by hand.
• Companion planting: Plant herbs like dill or marigolds nearby to deter pests naturally.
• Organic insecticides: If infestations occur, consider using neem oil or insecticidal soap as an eco-friendly option.

Disease Management

Watch out for common diseases such as downy mildew and black rot:

• Crop rotation: Avoid planting kohlrabi or other Brassicas in the same spot year after year.
• Proper spacing: Ensure adequate air circulation between plants to reduce humidity-related diseases.

Harvesting Kohlrabi

Timing is crucial when it comes to harvesting kohlrabi:

1. Optimal size: Harvest when bulbs are around 3–5 inches in diameter; they will be tenderer at this size.
2. Harvest method: Cut the bulb off at the base using a sharp knife while being careful not to damage neighboring plants.

Kohlrabi is best harvested before it becomes overly mature, as older bulbs may become tough and woody.

Storing Kohlrabi

Freshly harvested kohlrabi can be stored in the refrigerator:

• Remove leaves: Cut off leaves before storage to prolong freshness.
• Storage duration: Properly stored kohlrabi can last up to two weeks in the fridge.

You may also consider blanching and freezing excess kohlrabi for later use—just slice it into desired shapes, blanch for a few minutes, cool rapidly in ice water, then freeze in airtight containers.

Conclusion

Growing kohlrabi in Alabama can be an enjoyable experience that provides you with tasty and nutritious vegetables throughout the growing season. By following these guidelines on soil preparation, planting times, care routines, harvesting methods, and storage techniques, you’ll be well on your way to enjoying this delightful vegetable right from your garden! Whether you’re tossing it into salads or whipping up hearty soups, homegrown kohlrabi adds variety and nutrition to your meals while enhancing your gardening skills along the way. Happy gardening!