How to Grow Purple Chinese Kale
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Purple Chinese Kale
Brassica oleracea var. alboglabra
vegetablePurple Chinese kale, also known as Chinese broccoli or gai lan, is a leafy brassica with dark purple-tinged leaves and tender flowering stems. It produces small broccoli-like florets and has a mild, slightly sweet flavor. This cool-season crop is a staple in Asian cuisine and thrives in temperate climates.
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Example Purple Chinese Kale timeline · Pittsburgh, PA (Zone 6b)
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Plant Purple Chinese Kale
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 Purple Chinese Kale
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Purple Chinese Kale dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 5-8; grows year-round in mild climates; spring and fall crops in hot regions
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Get my Purple Chinese Kale timeline →Growth Stages
Seedling
10-14 daysTiny seedlings emerge with two cotyledons and first true leaves appear within 7-10 days. Plants are delicate and pale green.
Keep soil consistently moist. Provide bright light to prevent legginess. Thin seedlings to proper spacing once they have 2-3 true leaves.
Vegetative Growth
20-30 daysPlant develops 6-12 true leaves, becomes bushy and compact. Purple coloration intensifies on leaf edges and stems. Plants are dark green with purple tinges.
Water consistently, provide steady nutrition with balanced fertilizer. Monitor for pests weekly. Ensure adequate spacing for air circulation.
Bud Formation
10-15 daysFlowering stems begin to elongate from leaf axils. Small green buds form at stem tips, resembling miniature broccoli heads. Purple coloration deepens.
Continue consistent watering. Apply side-dress of nitrogen-rich fertilizer or compost. Harvest outer stems to encourage branching.
Flowering & Harvest Ready
5-10 days (optimal harvest window)Small florets open with yellow flowers if left unharvested. Tender flowering stems are crisp and flavorful. Peak eating quality is just before flowers fully open.
Begin harvesting regularly. Pick stems when buds are tight and green. Continued harvesting encourages more side shoots.
Mature/Bolt
7-14 daysPlants flower fully with yellow blooms covering stems. Leaves become tougher and more bitter. Seeds develop if plants are left in field.
Harvest all remaining edible material. Plants become woody and unsuitable for consumption. Pull and compost or leave for pollinators.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Use fine mesh netting, row covers. Hand-pick caterpillars. Spinosad spray if needed. Plant dill nearby to attract parasitoid wasps.
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Apply kaolin clay spray to repel. Use row covers on young plants. Neem oil for established infestations. Keep plants well-watered and healthy.
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Hand-pick caterpillars. Bacillus thuringiensis (Bt) spray. Encourage parasitoid wasps. Remove crop residues that harbor pupae.
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Strong water spray to dislodge. Insecticidal soap. Neem oil. Attract beneficial insects like ladybugs and lacewings.
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Practice crop rotation (3-year minimum). Improve soil drainage. Maintain pH above 7.2 if possible. Avoid planting other brassicas in same bed.
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Ensure good air circulation. Water at base only. Remove infected leaves. Sulfur fungicide if severe. Plant resistant varieties.
Uses
Stir-fries and Asian dishes
CulinaryPurple Chinese kale is a staple in Asian cuisine, prized for its tender stems and mild, slightly sweet flavor. Quickly stir-fried with garlic, soy sauce, and oil, it's a classic preparation that preserves its crisp texture. [source]
Steaming and boiling
CulinaryThe entire plant—stems, leaves, and young florets—can be steamed or blanched for 2-3 minutes, then served with sauces or dressings. This gentle cooking method maintains nutrient content and tender texture. [source]
Nutritional and anti-cancer potential
MedicinalPurple Chinese kale contains high levels of glucosinolates, which the body converts to sulforaphane, a compound with potential anti-cancer and anti-inflammatory properties. It's also rich in vitamins C and K, calcium, and iron. [source]
Juice and smoothies
HouseholdTender stems and leaves can be juiced or blended into smoothies and green drinks for concentrated nutrition. The mild flavor makes it less bitter than some other brassicas, blending well with fruits and other vegetables. [source]
Pollinator and beneficial insect food
WildlifeIf flowers are allowed to bloom, the yellow flowers attract bees, butterflies, and other pollinators. The plant also provides food and shelter for beneficial parasitoid wasps that prey on garden pests. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begin harvesting when flowering stems are 6-8 inches long and buds are tight and green, typically 45-60 days from sowing. Pinch or cut the main flowering head first, which encourages side shoots to develop. Harvest tender stems and leaves regularly to promote continued production over 3-4 weeks. Cut stems about 1-2 inches above the base. Harvest in the morning when stems are crisp and full of moisture. Purple Chinese kale is best eaten fresh within 1-2 days of harvest; store in refrigerator in a plastic bag for up to 5 days.
Fun Facts
- 🌱 Purple Chinese kale is not actually kale (Brassica oleracea var. acephala) but a variety of Chinese broccoli, yet the common name persists because of its leafy greens and brassica family membership.
- 🌱 In Hong Kong and southern China, purple Chinese kale is so popular it's often called the 'national vegetable,' and it appears on restaurant menus year-round in multiple preparations.
- 🌱 The purple pigmentation in the leaves comes from anthocyanins and other polyphenols, the same compounds that give blueberries and red cabbage their color and health benefits.
Gardening Terms
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