How to Grow Shanghai Bok Choy
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Shanghai Bok Choy
Brassica rapa subsp. chinensis
vegetableShanghai bok choy is a tender, mild-flavored Asian leafy green with thick, white petioles and dark green leaves. It matures quickly and is prized for its tender texture and slightly sweet flavor, making it ideal for stir-fries and Asian cuisine. This variety is smaller and more compact than other bok choy types, reaching just 6-8 inches at maturity.
When should you plant Shanghai Bok Choy in your zone?
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Example Shanghai Bok Choy timeline · Pittsburgh, PA (Zone 6b)
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Plant Shanghai Bok Choy
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 Shanghai Bok Choy
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Shanghai Bok Choy dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-10; prefers cool seasons
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Get my Shanghai Bok Choy timeline →Growth Stages
Seedling
1-2 weeksTiny seed germinates with cotyledons (seed leaves) emerging within 5-7 days. First true leaves appear small and heart-shaped.
Keep soil moist and warm (65-75°F). Provide bright light to prevent leggy seedlings. Thin seedlings to proper spacing when 1-2 inches tall.
Vegetative Growth
3-4 weeksRapid leaf and petiole development; plant becomes stockier with increasingly upright growth habit. Leaves darken and petioles thicken and whiten.
Maintain consistent moisture and fertility. Apply balanced fertilizer every 2-3 weeks. Weed regularly to reduce competition.
Head Development
1-2 weeksCentral leaves tighten and compact; the plant forms a dense, cup-like head with prominent white petioles and dark green leaves clustering together.
Continue regular watering and feeding. Monitor for pests closely during this stage. Reduce nitrogen if plant becomes too leafy.
Maturity
Variable, best harvested when tenderPlant reaches full size (6-8 inches tall) with tender, succulent petioles and inner leaves still light in color. Outer leaves may be darker and slightly tougher.
Begin harvesting outer leaves or harvest entire head. Continue watering. Watch for bolting in hot weather.
Bolting/Flowering
Signals end of harvest windowPlant sends up a flowering stem from the center if exposed to sustained heat (above 75°F) or long day length. Leaves become bitter and coarse.
Harvest immediately before bolting or use shade cloth in hot climates. Once bolting begins, quality declines rapidly. Remove bolted plants if not saving seeds.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use floating row covers, hand-pick caterpillars, spray with neem oil or Bacillus thuringiensis (Bt)
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Apply row covers, dust with diatomaceous earth, use neem oil spray, spray with spinosad
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Strong water spray to dislodge, insecticidal soap, neem oil, or reflective mulch
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Yellow sticky traps, neem oil spray, insecticidal soap, strong water spray
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Plant in well-draining soil with pH above 7.0, practice 4-year crop rotation, remove infected plants
Uses
Stir-fries & Asian Cuisine
CulinaryShanghai bok choy is a staple in Asian cooking, especially Chinese stir-fries. Its tender petioles and mild flavor pair perfectly with garlic, ginger, and soy sauce, and it cooks in just 2-3 minutes. [source]
Raw in Salads
CulinaryThe tender inner leaves and petioles can be eaten raw in salads, offering a mild, slightly sweet flavor and crisp texture. Baby Shanghai bok choy (4-6 weeks) is particularly tender for raw consumption. [source]
Nutritional & Anti-inflammatory Benefits
MedicinalShanghai bok choy is rich in vitamins A, C, and K, calcium, and glucosinolates (compounds with potential anti-inflammatory and cancer-preventive properties). Regular consumption may support bone health and immune function. [source]
Soups & Broths
CulinaryThe tender greens and petioles add nutrition and subtle flavor to soups, broths, and hot pot dishes. They hold their structure better than more delicate greens during cooking. [source]
Locally-Grown Groceries
HouseholdQuick-maturing Shanghai bok choy is perfect for home gardeners seeking to reduce grocery purchases. Multiple successions can be planted for continuous harvest throughout the cool season. [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 plants reach 6-8 inches tall and petioles are tender and succulent, typically 45-60 days after planting. Cut the entire head at the base with a sharp knife just below the lowest leaves, or harvest outer leaves while leaving the center to continue growing. Shanghai bok choy is best used fresh within 1-2 days of harvest but can be refrigerated for 5-7 days in a plastic bag. Harvest in the morning for maximum crispness. For continued harvest, pick outer leaves every few days.
Fun Facts
- 🌱 Shanghai bok choy is a relatively recent development in China (20th century), bred specifically for tender petioles and compact size, making it ideal for urban gardens and small spaces.
- 🌱 Unlike many leafy greens, bok choy can tolerate light frosts and is often one of the last vegetables harvested in fall, sweetening slightly after frost exposure.
- 🌱 The name 'bok choy' comes from Cantonese, meaning 'white vegetable,' referring to the white petioles, though Shanghai bok choy has a more compact, tender form than its larger Cantonese cousins.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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