How to Grow Kohlrabi in California (USA): Balcony & Indoor Setup – Complete How-To
As a resident of California, you may be familiar with the diverse array of produce that thrives in our temperate climate. One unique and often overlooked vegetable that deserves a spot in your garden or indoor setup is the mighty kohlrabi. This versatile member of the cabbage family offers a delightful combination of flavor and texture, making it a valuable addition to any California-based gardener’s repertoire.
In this comprehensive guide, we’ll explore the ins and outs of growing kohlrabi in California, whether you have a spacious backyard or a cozy balcony. From selecting the right cultivars to mastering the art of indoor cultivation, we’ll equip you with the knowledge and skills to cultivate a bountiful harvest of this nutrient-dense vegetable.
Understanding Kohlrabi’s Unique Characteristics
Kohlrabi, scientifically known as Brassica oleracea var. gongylodes, is a unique member of the cabbage family that grows both above and below the soil. Its name translates to “cabbage turnip” in German, and this descriptor aptly captures its distinct appearance and flavor profile.
Unlike traditional cabbage varieties, kohlrabi produces a swollen stem that grows above the ground, often resembling a bulb or globe. This bulbous stem, which can be green, white, or purple in color, is the edible portion of the plant. Underneath the soil, kohlrabi also develops tender, leafy greens that are equally delicious and nutritious.
Kohlrabi is renowned for its versatility in the kitchen, as both the stem and leaves can be consumed. The stem has a crisp, juicy texture and a mild, slightly sweet flavor, making it an excellent addition to salads, slaws, or even roasted as a side dish. The leaves, on the other hand, can be sautéed, steamed, or added to soups and stir-fries, much like other cruciferous greens.
Selecting the Right Kohlrabi Cultivars for California’s Climate
When it comes to growing kohlrabi in California, the choice of cultivar can make a significant difference in your success. Consider the following factors when selecting the best kohlrabi varieties for your California garden or indoor setup:
- Climate Adaptation: Look for cultivars that are specifically bred for warm-weather climates, such as Early White Vienna, Superschmelz, or Kossak. These varieties tend to thrive in California’s mild, Mediterranean-like conditions.
- Maturity Timeline: Choose cultivars with a relatively short maturity period, as they will be better equipped to withstand California’s often-long growing season. Early-maturing varieties like Quickstar or Purple Danube can be ready for harvest in as little as 45 days from sowing.
- Bolt Resistance: Select cultivars that are less prone to bolting (premature flowering) in response to California’s warm temperatures. Varieties like Rapid and Kolibri are known for their bolt resistance.
- Flavor and Texture: Consider your personal preferences when it comes to kohlrabi’s flavor and texture. Some cultivars, such as Superschmelz, are known for their extra-large, tender stems, while others, like Kossak, offer a more pronounced, earthy flavor.
Preparing Your California Garden or Indoor Growing Space
Once you’ve selected the ideal kohlrabi cultivars for your California climate, it’s time to set up your growing space. Whether you have a spacious backyard or a cozy balcony, kohlrabi can thrive in both outdoor and indoor environments.
Outdoor Gardening
If you have access to a sunny garden or raised bed, kohlrabi will be right at home. Choose a location that receives at least 6 hours of direct sunlight per day, and ensure the soil is well-draining and rich in organic matter. Amend the soil with compost or well-rotted manure to provide the necessary nutrients for your kohlrabi plants.
Sow the seeds directly in the ground, spacing them about 12-18 inches apart in rows that are at least 24 inches apart. Alternatively, you can start the seeds indoors 4-6 weeks before your desired planting date and then transplant the seedlings into your outdoor garden.
Indoor Cultivation
For those with limited outdoor space, such as a balcony or patio, indoor cultivation can be a fantastic solution for growing kohlrabi. Choose a sunny spot that receives at least 6 hours of direct sunlight per day, or supplement with a grow light if necessary.
Opt for a deep, wide container – at least 8 inches deep and 12 inches wide – to accommodate the bulbous kohlrabi stems. Use a well-draining potting mix enriched with compost or slow-release fertilizer to provide the necessary nutrients.
Sow the seeds directly in the container, spacing them about 6-8 inches apart. Thin the seedlings to the desired spacing once they have established their first set of true leaves.
Caring for Your Kohlrabi Plants
Regardless of whether you’re growing kohlrabi outdoors or indoors, the care and maintenance requirements are similar. Follow these tips to ensure a bountiful harvest:
- Water Regularly: Keep the soil consistently moist, but avoid waterlogging. The roots of kohlrabi are sensitive to both drought and excess moisture.
- Fertilize Judiciously: Apply a balanced, slow-release fertilizer or compost tea every 4-6 weeks to replenish the soil’s nutrients. Avoid high-nitrogen fertilizers, as they can promote lush foliage at the expense of bulb development.
- Provide Ample Space: Thin the seedlings to the recommended spacing to allow for proper growth and air circulation around the plants.
- Protect from Pests: Keep an eye out for common kohlrabi pests, such as aphids, cabbage worms, and flea beetles, and address any infestations promptly with organic pest control methods.
- Monitor for Bolting: Be vigilant for signs of premature flowering, or bolting, especially during periods of warm weather. If the plant begins to bolt, remove it immediately to prevent the development of a woody, inedible stem.
Harvesting and Enjoying Your Kohlrabi Bounty
The best time to harvest kohlrabi is when the bulb has reached 2-4 inches in diameter, usually around 45-60 days after sowing. To harvest, simply use a sharp knife or garden shears to cut the stem at the soil line, leaving a small portion of the stem attached to the bulb.
Once harvested, the kohlrabi bulbs can be stored in the refrigerator for up to 2 weeks, ensuring you have a steady supply of this versatile vegetable. The leaves can also be harvested and used in a variety of culinary applications, such as sautés, soups, or as a nutritious addition to salads.
When it comes to enjoying your kohlrabi harvest, the possibilities are endless. Slice the bulbs into thin discs and enjoy them raw in salads or with a creamy dip. Roast or sauté the bulbs for a delicious side dish, or incorporate them into stir-fries, curries, or even fritters. The leaves can be treated like any other leafy green, adding texture and nutrition to your meals.
Growing kohlrabi in California, whether on a balcony or in a backyard garden, is a rewarding and versatile endeavor. By selecting the right cultivars, preparing your growing space, and providing the necessary care, you can enjoy a bountiful harvest of this unique and flavorful vegetable. Embrace the diversity of California’s agricultural landscape and let kohlrabi become a staple in your culinary repertoire.
