How to Grow Kailaan
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Kailaan
Brassica oleracea var. alboglabra
vegetableKailaan, also known as Chinese broccoli or gai lan, is a leafy green vegetable with thick stalks and small flowering heads. It has a mild, slightly sweet flavor and tender texture when properly cooked. The entire plant—leaves, stalks, and flower buds—is edible and highly nutritious.
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Example Kailaan timeline · Pittsburgh, PA (Zone 6b)
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Plant Kailaan
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 Kailaan
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Kailaan dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 4-9; grows year-round in mild climates (zones 8-10)
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Get my Kailaan timeline →Growth Stages
Seedling
2-3 weeksTiny cotyledons emerge with first true leaves appearing within 1-2 weeks. Seedlings are delicate with thin stems.
Keep soil moist, provide bright light, maintain 65-75°F temperature, thin seedlings to proper spacing when 2-3 inches tall
Vegetative Growth
3-4 weeksPlant develops multiple leaves on increasingly thick stems; no flowering yet. Foliage is vibrant green and densely packed.
Water regularly, provide consistent light, apply balanced fertilizer every 2-3 weeks, remove any damaged or yellowing leaves
Flowering
1-2 weeksSmall flower buds form at the top of the stalks and between leaf axils. Buds are tightly clustered and yellow-green.
Maintain consistent watering and temperature, avoid excessive nitrogen to prevent all-leaf growth, light fertilization continues
Harvest-Ready
Peak 1-2 weeksCentral heads are fully formed with tight buds ready for harvest; stalks are tender and crisp. Side shoots may be developing.
Begin harvesting when central head reaches 3-4 inches tall; harvest in early morning for best crispness; continue monitoring for pests
Extended Harvest
3-4 weeksAfter central head harvest, lateral shoots emerge and continue producing smaller heads and tender shoots for several weeks.
Cut side shoots regularly to encourage continued production, water and fertilize moderately, harvest when tender before flowers open
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Handpick caterpillars, use Bt (Bacillus thuringiensis), apply neem oil, row covers over seedlings
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Row covers on young plants, reflective mulch, neem oil spray, pyrethrin-based insecticides
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Strong water spray to dislodge, insecticidal soap, neem oil, encourage beneficial predators like ladybugs
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Yellow sticky traps, neem oil, insecticidal soap, reflective mulch
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Improve air circulation, sulfur dust or spray, baking soda solution (1 tbsp per gallon water)
Uses
Stir-frying and Asian cuisine
CulinaryKailaan is a staple in Chinese cooking, commonly stir-fried with garlic and oyster sauce. Its tender stalks and mild flavor make it versatile for quick cooking methods. [source]
Nutritious whole-plant vegetable
CulinaryUnlike regular broccoli, every part of kailaan is edible and tender, including leaves and stalks. It can be steamed, boiled, sautéed, or blanched. [source]
Cruciferous vegetable cancer prevention
MedicinalLike all brassicas, kailaan contains glucosinolates and sulforaphane compounds shown to have potential anti-cancer properties. Regular consumption supports overall cellular health. [source]
High-calcium leafy green
CulinaryKailaan is an excellent source of calcium and other minerals, making it particularly valuable in Asian cuisines where it serves as a nutritious supplement to rice-based diets. [source]
Pollinator support and beneficial insect habitat
WildlifeWhen allowed to flower, kailaan's yellow flowers attract bees and other pollinators. Letting some plants bolt provides valuable food for beneficial insects. [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 central head is firm and buds are still tight, typically 45-60 days after planting. Cut the main head 2-3 inches below the flower head, leaving the stem intact to encourage lateral shoot production. Morning harvest ensures maximum crispness. Continue harvesting side shoots as they develop, cutting when 3-4 inches long. Plants can produce for 6-8 weeks with regular harvesting.
Fun Facts
- 🌱 Kailaan is known by many names across Asia: gai lan in Cantonese, Chinese broccoli in English, and kai-lan in Thai cuisine, reflecting its popularity throughout the continent.
- 🌱 Unlike regular broccoli, kailaan can be harvested multiple times from the same plant—removing the central head triggers the plant to produce numerous side shoots that continue producing for weeks.
- 🌱 The tender stalks of kailaan are prized for their delicate texture and are often the most valued part of the plant in traditional Chinese cooking, sometimes more so than the florets.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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