How to Grow Wong Bok
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Wong Bok
Brassica rapa subsp. pekinensis
vegetableWong Bok, also known as Napa cabbage or Chinese cabbage, is an elongated, barrel-shaped brassica with tender, pale green to white leaves and prominent ribs. It has a milder, sweeter flavor than traditional cabbage and is commonly used in Asian cuisine, particularly for kimchi and stir-fries. This cool-season crop prefers shorter day lengths and moderate temperatures for optimal head formation.
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Example Wong Bok timeline · Pittsburgh, PA (Zone 6b)
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Plant Wong Bok
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Wong Bok
Around Jun 16≈ 60 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Wong Bok dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9, best grown as a fall crop in warmer regions
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Seedling
2-3 weeksTiny plants with 2-4 true leaves, resembling miniature cabbage seedlings
Keep soil consistently moist. Provide 12-16 hours of light daily under grow lights if indoors. Thin seedlings to proper spacing or transplant when 2-3 true leaves appear.
Vegetative
3-4 weeksRapid leaf growth with 6-10 leaves forming a loose rosette, plant height 6-12 inches
Maintain consistent moisture and fertility. Apply balanced fertilizer every 2-3 weeks. Monitor for pests. Ensure 6+ hours of sunlight daily.
Head Formation
2-3 weeksOuter leaves begin to curve inward, forming a loose head; plant becomes more compact
Reduce nitrogen slightly, maintain consistent watering. Cool nights (below 65°F) promote tighter head formation. Protect from extreme heat.
Head Maturation
2-3 weeksHead becomes dense and compact, leaves pale and tender, full barrel-shape achieved
Continue steady watering and moderate feeding. Check soil moisture regularly. Heads are ready when firm to gentle pressure.
Harvest
Harvest window 1-2 weeks optimal, can extend slightly with cool weatherHead is fully formed, compact, and pale green with uniform shape
Harvest when firm but before splitting. Cut at soil level with a sharp knife or pull entire plant.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Row covers, Bt (Bacillus thuringiensis) spray, handpicking. Remove affected outer leaves.
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Row covers on young plants, neem oil, diatomaceous earth. Keep weeds controlled.
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Strong water spray, insecticidal soap, neem oil, ladybugs and lacewings for biocontrol.
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and
Copper tape barriers, beer traps, handpicking at night, encourage ground beetles.
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Cardboard collars around seedlings, row covers, diatomaceous earth at soil line.
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Resistant varieties, crop rotation (3-4 years), lime soil to pH 7.0+, remove affected plants.
Uses
Kimchi & Fermentation
CulinaryWong Bok is the traditional choice for kimchi-making in Korean cuisine due to its tender texture and mild flavor that absorbs spices beautifully. The vegetable's natural sugars and structure make it ideal for lacto-fermentation. [source]
Stir-Fries & Asian Cooking
CulinaryIts delicate leaves cook quickly and tender stems add crunch. Commonly used in Chinese, Vietnamese, and Thai stir-fries, soups, and spring rolls for its mild sweetness. [source]
Fresh & Raw Salads
CulinaryThe pale inner leaves are tender and sweet, perfect for fresh slaws and salads. Provides a gentle alternative to regular cabbage in coleslaw. [source]
Digestive & Nutritional Health
MedicinalRich in vitamin C, vitamin K, and fiber. Contains glucosinolates with potential anti-inflammatory and cancer-preventive properties. Supports digestive health. [source]
Food Storage & Preservation
HouseholdExcellent cold storage vegetable that keeps 2-4 months in proper conditions, making it valuable for winter food security and storage gardens. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Harvest when heads are firm and compact, typically 60-90 days from planting. Check firmness by gentle pressure; heads should feel solid. Cut at soil level with a sharp knife, leaving roots in place for potential regrowth in cool climates. Early morning harvest ensures crispness. Can be stored in a cool cellar or refrigerator (32-40°F, 90-95% humidity) for 2-4 months.
Fun Facts
- 🌱 Wong Bok is highly sensitive to day length; varieties are often classified as 'short-day' types that head better in fall/winter conditions, which is why spring plantings often bolt without forming heads.
- 🌱 A single mature Wong Bok head can weigh 3-5 pounds and is composed of 50-80 individual leaves layered in a spiral pattern.
- 🌱 This vegetable originated in China where it has been cultivated for thousands of years, but became widely popular in Korea, Japan, and the West only in the 20th century.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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