Growing Kohlrabi in Containers and Small Spaces

[Stephen Albert]

Kohlrabi is a versatile, cool-season vegetable that can thrive even in limited space. With over 30 years of gardening experience, I’ve successfully grown kohlrabi in raised beds, patio containers, and small urban gardens. Container gardening allows for better soil control, easier pest management, and mobility, making it ideal for small spaces or apartment patios.

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Choosing the Right Container​

• Size: Use containers at least 12 inches deep and 12–16 inches wide to accommodate the bulb and roots.
• Drainage: Ensure your container has holes for good drainage to prevent root rot.
• Material: Terra-cotta, plastic, or fabric pots all work; lightweight options make moving easier.

Tip from experience: I often use fabric grow bags in my patio garden—they provide excellent drainage and airflow.

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Soil and Fertilization​

• Use well-draining, fertile potting mix enriched with compost or aged manure.
• Kohlrabi is a heavy feeder—apply a slow-release organic fertilizer at planting and side-dress with compost every 3–4 weeks.
• Avoid compacted soil, which can stunt bulb growth.

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Planting in Containers​

• Sow seeds ¼–½ inch deep or transplant seedlings carefully.
• Space plants 8–12 inches apart in larger containers to allow bulbs to develop fully.
• Thin seedlings early to prevent overcrowding.

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Watering and Maintenance​

• Keep soil consistently moist but not waterlogged.
• Morning watering reduces disease risk and promotes strong root growth.
• Mulch the surface with straw or shredded leaves to retain moisture and suppress weeds.

Tip from experience: Container-grown kohlrabi may need more frequent watering during hot summer days.

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Pest Management​

• Use row covers to protect young plants from cabbage worms and flea beetles.
• Inspect leaves regularly and remove any pests by hand or with insecticidal soap.
• Companion plant small herbs like dill or thyme to naturally deter pests.

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Harvesting in Containers​

• Harvest kohlrabi when bulbs reach 2–3 inches in diameter for the best flavor and texture.
• Outer leaves can be eaten while leaving the center bulb to continue growing.

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My Experience​

Growing kohlrabi in containers and small spaces is entirely feasible with proper soil, watering, and care. With the right container size and maintenance, you can enjoy tender, crisp kohlrabi bulbs even in limited gardens, patios, or balconies. Container gardening makes kohlrabi accessible to urban gardeners and ensures a continuous, manageable harvest.

Container Kohlrabi Planting & Care Chart​

Task	Recommendation	Experience Tip
Container Size	12–16 inches wide and deep	Fabric grow bags provide excellent drainage and airflow
Soil	Well-draining, fertile potting mix with compost or aged manure	Avoid compacted soil to prevent stunted bulbs
Planting Depth	Sow seeds ¼–½ inch deep or transplant seedlings	Thin seedlings early to avoid overcrowding
Spacing	8–12 inches between plants in containers	Allows bulbs to grow fully without competition
Watering	Keep soil consistently moist, water in the morning	Container soil dries faster; mulch to retain moisture
Fertilization	Slow-release organic fertilizer at planting; side-dress every 3–4 weeks	Heavy feeders need regular nutrients for large, tender bulbs
Pest Control	Row covers, inspect leaves, companion herbs (dill, thyme)	Handpick pests early for best results
Harvesting	When bulbs are 2–3 inches in diameter	Outer leaves can be harvested while bulbs continue to grow

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Tip from My Experience:
Container-grown kohlrabi thrives with consistent moisture, proper spacing, and light fertilization—perfect for patios and small urban gardens.

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