Kohlrabi, a member of the cabbage family, is an unusual and delicious vegetable that has gained popularity among home gardeners. Its unique taste and crunchy texture make it a versatile ingredient in various cuisines. If you live in Washington and are interested in growing your own kohlrabi, this guide will provide you with essential tips and techniques for successful cultivation.
Kohlrabi, also known as turnip cabbage, is known for its bulbous stem that grows above ground. This unique vegetable comes in two primary varieties: green and purple. Both types have similar flavors but slightly different appearances. The crisp, mildly sweet taste of kohlrabi can be enjoyed raw in salads, steamed, roasted, or even pickled.
Kohlrabi is not just delicious; it’s also highly nutritious. It is low in calories and rich in vitamins C and K, as well as fiber. This makes it an excellent addition to a healthy diet. Additionally, kohlrabi is packed with antioxidants that contribute to overall health.
Washington state offers diverse climates, from temperate coastal regions to mountainous areas. Kohlrabi thrives best in cooler temperatures, ideally between 60°F and 75°F (15°C – 24°C). In Washington’s climate, spring and fall are the best times to grow kohlrabi due to milder conditions.
Kohlrabi prefers well-drained, fertile soil rich in organic matter. A pH level between 6.0 and 7.0 is ideal for optimal growth. Consider conducting a soil test to determine pH levels and nutrient content before planting. Amending the soil with compost or well-rotted manure can greatly enhance fertility.
In Washington, you can sow kohlrabi seeds directly into the garden around mid-March to April for spring crops or late summer (August) for fall crops. Timing is essential; planting too late may result in bolting or poor quality.
Choose quality seeds from reputable sources, considering both green and purple varieties according to your taste preference. Look for disease-resistant varieties if possible.
While kohlrabi can be directly seeded into the garden, starting seeds indoors can lead to a head start on the growing season. If you choose to transplant, start seeds indoors about 4-6 weeks before the last expected frost date.
Direct Seeding: Plant seeds about ½ inch deep and 2-3 inches apart in rows spaced 12-18 inches apart.
Transplanting: Start seeds indoors and transplant seedlings when they are about 4 inches tall, spacing them similarly as direct-seeded plants.
If you’ve direct-seeded your kohlrabi, it’s important to thin seedlings once they’ve developed their true leaves. Space them about 6-8 inches apart to give each plant ample room to grow without competition for nutrients.
Kohlrabi requires consistent moisture for optimal growth. Water deeply once a week, ensuring that the soil remains evenly moist but not waterlogged. During hot spells or dry periods, more frequent watering may be necessary.
Applying a balanced fertilizer at planting time will provide essential nutrients for your kohlrabi plants. Consider using organic options like fish emulsion or seaweed extract as your plants grow. Side-dressing with compost mid-season can also promote healthy growth.
Applying a layer of mulch around your plants helps retain moisture, suppress weeds, and maintain consistent soil temperature. Organic mulch options such as straw or wood chips work well.
Kohlrabi can attract several pests such as aphids, cabbage worms, and flea beetles. Regularly inspect your plants for signs of infestation:
Kohlrabi can typically be harvested anywhere from 50-70 days after planting, depending on the variety and growing conditions. The best time to harvest is when the bulbs reach about 2-4 inches in diameter—harvesting earlier often leads to a sweeter flavor.
To harvest:
Freshly harvested kohlrabi can be stored in the refrigerator for up to two weeks if kept in a plastic bag with some ventilation holes to prevent moisture buildup. For longer storage, consider blanching and freezing kohlrabi pieces for use throughout the winter months.
Kohlrabi can be used in various dishes due to its versatile flavor profile:
Growing kohlrabi in Washington is an exciting venture that can yield tasty results with proper planning and care. By understanding its growing requirements, selecting the right planting time, maintaining adequate care throughout its lifecycle, and learning how to incorporate this unique vegetable into your meals, you’ll not only enjoy gardening but also savor the rewards of your efforts on your plate!
With its nutritional benefits and distinct flavor profile, kohlrabi deserves a place in every gardener’s plot—especially here in the diverse landscapes of Washington state! Happy gardening!