How to Grow Green Yu Choy
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Green Yu Choy
Brassica rapa subsp. parachinensis
vegetableGreen Yu Choy, also known as Chinese broccoli or Gai Lan, is a leafy green vegetable prized in Asian cuisine for its tender stems and nutritious leaves. It features dark green, slightly waxy foliage and small clusters of immature flower buds similar to broccoli. This fast-growing brassica is mild-flavored and versatile in the kitchen.
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Example Green Yu Choy timeline · Pittsburgh, PA (Zone 6b)
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Plant Green Yu 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 Green Yu Choy
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Green Yu Choy dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-9; cool-season crop that prefers spring and fall growing
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Seedling
2-3 weeksSeed germinates in 7-10 days; two cotyledons emerge followed by first true leaves. Plants are delicate and small.
Keep soil moist but not soggy. Provide steady warmth (65-75°F). Thin seedlings to proper spacing once they have 2-3 true leaves. Protect from direct sun if very intense.
Vegetative Growth
3-4 weeksPlants develop multiple dark green leaves on tender stems. Leaf production accelerates and plants build robust foliage. No flowering yet.
Water consistently; provide balanced fertilizer every 2-3 weeks. Monitor for pests. Maintain cool conditions (60-70°F) if possible. Keep soil consistently moist.
Budding
1-2 weeksSmall, tight clusters of immature flower buds form at the leaf axils and top of the plant, resembling miniature broccoli heads.
Harvest promptly when buds are tight and green. Do not allow flowers to open fully, as this reduces quality. Continue consistent watering.
Flowering
2-3 weeksIf not harvested, flower buds open into small yellow or white flowers. The plant becomes less desirable for consumption at this stage.
If you allow flowering for seed production, reduce fertilizer. Deadhead regularly if you want extended leaf production.
Seed Pod Development
3-4 weeksAfter pollination, small seed pods (siliques) develop on the flowering stems. Seeds mature and dry.
Allow to dry on the plant if saving seeds. Collect pods when brown and papery. Plants are no longer edible at this stage.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use row covers until flowering. Hand-pick caterpillars. Apply Bt (Bacillus thuringiensis) spray when larvae appear. Encourage parasitic wasps.
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Use row covers on young plants. Spray neem oil or insecticidal soap. Apply diatomaceous earth. Maintain soil moisture.
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Spray with strong water stream. Use insecticidal soap or neem oil. Encourage beneficial insects like ladybugs. Apply early in season.
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Use yellow sticky traps. Spray neem oil or insecticidal soap weekly. Increase air circulation. Remove infested leaves.
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Rotate crops (avoid brassicas in same soil for 3-4 years). Raise soil pH to 7.2+. Remove and destroy infected plants. Use resistant varieties if available.
Uses
Asian Stir-fry Staple
CulinaryGreen Yu Choy is a beloved vegetable in Chinese, Vietnamese, and other Asian cuisines, commonly stir-fried with garlic, oyster sauce, and sesame oil. The tender stems and leaves have a mild, slightly sweet flavor that works well with soy-based dishes. [source]
Nutritious Greens
CulinaryRich in vitamins A, C, and K, plus calcium and iron. Can be blanched, sautéed, added to soups, or used raw in salads when young and tender. [source]
Traditional Medicine
MedicinalUsed in Traditional Chinese Medicine for its cooling properties and to support digestive and respiratory health. Contains glucosinolates, compounds with potential anti-cancer properties. [source]
Pollinator Flowers
WildlifeIf allowed to flower, the small yellow blooms attract bees and other pollinators, supporting garden biodiversity. [source]
Microgreens & Sprouts
HouseholdCan be grown as microgreens indoors for fast, nutrient-dense harvests in 10-14 days, providing tender shoots for salads and garnishes. [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 are 6-10 inches tall and flower buds are tight and green (45-60 days). Cut the main head with 2-3 inches of stem using a sharp knife. Secondary shoots will develop for continued harvesting. Pick regularly to encourage leaf production and prevent flowering. Morning harvest provides crispest texture. Can be harvested as microgreens at 10-14 days for tender leaves.
Fun Facts
- 🌱 Green Yu Choy is known by many regional names including Gai Lan (Cantonese), Chinese broccoli, Chinese kale, and Kai-lan, reflecting its popularity across Asia.
- 🌱 Unlike heading broccoli, Yu Choy was bred for its edible stems and leaves rather than large flower heads, making it a unique brassica that produces secondary shoots after the main stem is harvested.
- 🌱 It is a cool-season crop that actually improves in flavor after a light frost, as starches convert to sugars for natural antifreeze production in the plant.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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