How to Grow Gai Lan
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Gai Lan
Brassica oleracea var. alboglabra
vegetableGai lan, also known as Chinese broccoli, is a leafy green vegetable with thick stems and small florets that resembles broccoli but with longer, more tender stems and a slightly sweeter flavor. It is a cool-season brassica that is quick-growing and highly nutritious, popular in Asian cuisine. The plant produces edible flower heads, stems, and leaves that are harvested before the flowers fully open.
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Example Gai Lan timeline · Pittsburgh, PA (Zone 6b)
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Plant Gai Lan
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 Gai Lan
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Gai Lan dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; can be grown year-round in mild climates
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Get my Gai Lan timeline →Growth Stages
Seedling
7-10 daysCotyledons emerge and first true leaves develop; seedlings are small and delicate
Keep soil moist; provide bright light; maintain temperature 60-70°F; thin crowded seedlings to proper spacing
Vegetative
2-3 weeksPlant develops multiple leaves and stems; grows rapidly with lush green foliage; stems thicken
Maintain consistent moisture and fertility; apply balanced fertilizer every 2-3 weeks; keep weed-free; monitor for pests
Bud Development
1-2 weeksSmall flower buds form at the stem tips; secondary side shoots emerge with their own buds
Continue regular watering and fertilizing; reduce nitrogen slightly to encourage flowering; maintain cool temperatures if possible
Flowering and Harvest-Ready
3-5 days to optimal harvest windowFlower heads become visible and tight; buds are firm, dense, and unopened; plant reaches 12-18 inches tall
Monitor daily for harvest readiness; harvest before flowers open; cooler weather extends harvest window
Post-Harvest Regrowth
2-4 weeksAfter main head harvest, side shoots continue to develop with smaller florets
Continue watering and light fertilizing; side shoots can be harvested for 2-4 additional weeks
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Insect netting when young; Bacillus thuringiensis (Bt); hand-pick caterpillars; regular monitoring
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Strong water spray; neem oil; insecticidal soap; encourage beneficial insects like ladybugs
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Floating row covers; neem oil; diatomaceous earth; avoid overfeeding with nitrogen
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Bt spray; hand-pick; insecticidal soap; row covers
Uses
Stir-frying and Asian cuisine
CulinaryGai lan is a staple in Chinese and Southeast Asian cooking, commonly stir-fried with garlic, oyster sauce, and sesame oil. The entire plant—stems, florets, and leaves—is edible and tender enough to cook quickly over high heat, making it ideal for wok cooking. [source]
Fresh eating and blanching
CulinaryThe tender stems and florets can be lightly blanched and served as a side dish, or enjoyed raw in salads. Gai lan is mild, slightly sweet, and less sulfurous than regular broccoli, making it appealing to a wider audience. [source]
Nutritional and health benefits
MedicinalGai lan is rich in vitamins A, C, and K, plus glucosinolates (compounds with potential anti-cancer properties) and fiber. Traditional Chinese medicine considers it cooling and beneficial for digestion and circulation. [source]
Pest management and companion planting
HouseholdGai lan is an excellent trap crop in integrated pest management strategies, attracting cabbage pests away from other brassicas. Its rapid growth makes it useful for quick crop rotations and succession planting. [source]
Pollinator attraction
WildlifeIf allowed to flower, gai lan produces attractive small white flowers that attract bees and other beneficial insects, supporting pollinator populations in the garden. [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 the main flower head is tight and unopened (typically 45-60 days from planting). Cut the central head 4-6 inches below the bud cluster with a sharp knife. Multiple side shoots will develop after the main head is removed, providing additional harvests over 2-4 weeks. For best flavor and tenderness, harvest early morning when stems are crisp. Harvest regularly to encourage continued side shoot production.
Fun Facts
- 🌱 Gai lan is a relatively new crop to Western markets but has been cultivated in southern China for centuries, particularly in Guangdong province where it remains a dietary staple.
- 🌱 Unlike regular broccoli, gai lan is quick-maturing and can produce a harvestable main head in as little as 45 days, making it ideal for succession planting and continuous harvests.
- 🌱 The flavor of gai lan is often described as sweeter and more delicate than regular broccoli, with a nutty undertone, and it contains significantly less of the sulfurous compounds that give cabbage its distinctive smell when cooked.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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