Kai-lan
A popular Cantonese vegetable also known as Chinese kale, prized for its thick, crisp stems and glossy blue-green leaves.
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Meet Kai-lan
A popular Cantonese vegetable also known as Chinese kale, prized for its thick, crisp stems and glossy blue-green leaves. The flavor is similar to broccoli but with a slightly bitter, earthy edge that pairs well with oyster sauce. Harvest the entire plant or cut flowering stems just as buds begin to appear for the most tender texture. Succession plant every three weeks for continuous harvest through cool seasons.
When to plant Kai-lan
Direct sow seeds one-quarter inch deep in prepared soil once temperatures reach 50 degrees Fahrenheit. Thin seedlings to 6 to 8 inches apart when they have 2 true leaves. For transplanting, start seeds indoors 4 weeks before the last frost in cell trays. Germination takes 4 to 7 days at 60 to 75 degrees. Begin successive sowings every 2 to 3 weeks for continuous production.
Your Kai-lan Year
Composed for Zone 7 · typical seasons · frost passes Apr 2, returns Nov 1
Sow Kai-lan Mar – Apr, Aug – Sep, pick May – Jun, Oct – Nov. Set your climate below and every date on this plate re-times itself.
How to grow Kai-lan
Kai-lan or Chinese broccoli is a fast-growing, heat-tolerant brassica perfect for warm-season production. Direct sow seeds one-quarter inch deep in well-prepared soil, spacing 6 to 8 inches apart in rows 18 inches apart. Seeds germinate in 4 to 7 days at 60 to 75 degrees Fahrenheit.
Kai-lan prefers full sun but tolerates partial shade in hot climates. Keep soil consistently moist, as dry conditions cause tough, bitter stems. Sow successionally every 2 to 3 weeks from spring through fall for a continuous harvest of tender flowering stems.
Fertilize with nitrogen-rich feed every 2 to 3 weeks to promote rapid, tender growth. Harvest when flower buds are just visible but still tightly closed, cutting stems 6 to 8 inches long. Regular harvesting encourages side shoot production, extending the harvest period. In hot weather, provide afternoon shade to prevent premature bolting.
36 plants fit a 4 × 8 ft bed
Each Kai-lan wants 25 cm of elbow room. The planner keeps that spacing for you — every plant, every bed.
Kai-lan's best neighbours
Kai-lan grows well alongside other Asian greens, lettuce, and herbs like cilantro and basil. Radishes planted nearby help deter flea beetles and break up compacted soil. Avoid planting near other brassicas to reduce shared pest pressure. Marigolds and sweet alyssum attract beneficial insects that control aphids.
Celery belongs beside it. Tomato doesn't.
Old growers' knowledge, checked against Kai-lan's real companion table below — test any plant you're growing.
Related growing guides
Feed it well
Kai-lan grows best in fertile, well-drained soil with a pH between 6.0 and 7.0. Work in 2 to 3 inches of compost before sowing. Apply a nitrogen-rich liquid fertilizer every 2 to 3 weeks to promote rapid, tender growth. Avoid high-phosphorus fertilizers that can inhibit micronutrient uptake. Side-dress with composted manure at mid-season for sustained production.
Ideal Temperature
Hardiness Zone Compatibility
From seed to harvest, stage by stage
Seed Germination
Kai-lan seeds germinate readily in cool, moist soil within 5-10 days. The small round seeds produce a pair of broad, heart-shaped cotyledon leaves that emerge quickly in optimal conditions. Seeds can be direct-sown or started in trays for transplanting.
Seedling Development
True leaves develop with the characteristic thick, waxy, blue-green appearance. The stem begins to thicken and the plant establishes a robust root system. Growth is steady in cool conditions and seedlings can tolerate light frost once established.
Vegetative Growth
Plants grow rapidly, developing thick succulent stems and large glossy leaves. The central stem elongates and side leaves broaden. This is when kai-lan builds the mass that makes its stems so prized for cooking. Plants typically reach 25-40 cm tall.
Bud Formation
Compact clusters of small flower buds form at the top of the central stem, signaling the primary harvest window. The buds should be tight and green — this is the peak of flavor and tenderness. The stem is thick, juicy, and snaps cleanly when bent.
Side Shoot Production
After the central stem is harvested, the plant produces multiple side shoots from the leaf axils, each developing its own cluster of flower buds. These secondary stems are slightly thinner but equally tender and flavorful. A single plant can produce 3-5 rounds of side shoot harvests.
Flowering and Seed Set
If not harvested, buds open into small white four-petaled flowers typical of the brassica family. Bees and other pollinators visit the flowers, and long slender seed pods develop. Plants left to flower become tough and bitter but are useful for seed saving.
Sow seeds 1 cm deep in well-draining soil kept consistently moist. Soil temperature of 15-25°C (60-77°F) is ideal — germination slows significantly above 30°C (86°F). Thin seedlings to 15-20 cm apart once they emerge.
Caring for Kai-lan month by month
What to do each month for your Kai-lan
July
You are hereRest period in most climates — kai-lan struggles above 30°C (86°F). Prepare beds for autumn planting by incorporating compost and adjusting soil pH to 6.0-7.0. In cool-summer regions, continue succession sowing.
Know exactly what to do in your garden — every month
One email at the start of each month: what to sow, plant, and tackle right now — for your Kai-lan and everything growing around it. Plus a short starter course that helps you dodge the classic mistakes.
- What to do, right now
- Matched to your season
- Starter course included
Harvesting Kai-lan
Harvest kai-lan when the main flowering stem is about 8 inches long and flower buds are visible but still tightly closed. Cut the stem at a 45-degree angle about 2 inches above the soil line to encourage regrowth of side shoots. Side shoots can be harvested the same way over the following weeks. If yellow flowers appear, the stems become tough, so harvest promptly. Morning harvest ensures maximum crispness.
assuming you sow when the window opens — set your real date
Pick Kai-lan promptly and the plant keeps producing.
Storage & Preservation
Fresh kai-lan stores for up to 1 week in the refrigerator wrapped in a damp paper towel inside a plastic bag. For freezing, blanch whole stems for 2 minutes, ice-bath, drain, and freeze flat in bags. Kai-lan does not dry well but can be pickled in a light brine with garlic and chili. Use within a few days of harvest for the best texture and sweetness.
What goes wrong — and the fix
Flea Beetles
PestNumerous tiny round holes in leaves giving a shotgun appearance, especially damaging to young seedlings.
Aphids
PestClusters of small insects on flowering stems and undersides of leaves, causing distorted growth.
Downy Mildew
DiseaseYellow spots on upper leaf surfaces with fuzzy gray-white growth underneath, progressing to brown patches.
Troubleshooting Common Problems
Premature bolting is the main issue, triggered by heat stress, drought, or long days. Tough, woody stems result from delayed harvest or insufficient water. Flea beetle damage can devastate young seedlings before they establish. Overcrowding leads to thin, spindly stems rather than the desired thick, tender shoots.
Growing Tips
- Succession sow every 3 weeks for a continuous harvest rather than planting all at once. Kai-lan has a relatively short harvest window per planting, so staggered sowing ensures you never run out of fresh stems during the growing season.
- Harvest the main stem when flower buds are tight and green but have not yet opened — this is the single most important timing decision for quality. Once white petals appear, the stem toughens rapidly and flavor turns bitter within days.
- Cut the main stem about 15 cm from the soil surface rather than pulling the whole plant. This leaves several leaf nodes intact, and each node will produce a side shoot that develops its own harvestable stem with flower buds in 2-3 weeks.
- Keep soil consistently moist throughout the growing period. Irregular watering causes hollow, pithy stems that lack the juicy crunch that defines high-quality kai-lan. Drip irrigation or soaker hoses on a timer work best.
- Grow kai-lan in spring and autumn, avoiding midsummer heat in most climates. Plants that experience sustained temperatures above 30°C (86°F) bolt prematurely and produce thin, tough, bitter stems unfit for the table.
- Net or cover plants with fine mesh from transplanting onward in areas with cabbage white butterflies. Their green caterpillars can devastate kai-lan leaves in days and hide deep within the leaf canopy where they are difficult to spot.
- Feed generously with nitrogen-rich fertilizer or compost tea every two weeks during active growth. Kai-lan is a heavy feeder that produces thick, sweet stems only when nutrients are abundant — underfed plants yield thin, fibrous stems.
- Blanch thick stems in boiling salted water for 60-90 seconds before stir-frying if they are wider than 1.5 cm. This ensures the stems cook through to tender-crisp perfection rather than remaining raw in the center while the leaves overcook.
Pick your Kai-lan
Green Lance
A popular hybrid with thick, tender stems and good bolt resistance for extended harvest windows.
Blue Star
An heirloom variety with blue-green leaves, thick stems, and excellent traditional flavor.
Crispy Blue
A compact variety ideal for container growing with tender, sweet flowering stems.
Kailaan
A heat-tolerant selection producing abundant side shoots after the main stem is harvested.
Kai-lan typically sells for $4-8 per bunch (200-300g) at Asian grocery stores and $6-12 at specialty markets or farmers markets. A single seed packet costing $3-5 can produce 50-80 plants across multiple succession sowings. Growing just 6-8 plants at a time with continuous succession planting can yield the equivalent of $60-120 worth of kai-lan per season. The savings are especially significant for those who cook Cantonese food regularly, where kai-lan is a frequent staple ingredient.
Quick recipes
Kai-lan with Oyster Sauce and Garlic
10 minThe classic Cantonese preparation found in dim sum restaurants worldwide. Tender blanched kai-lan stems are drizzled with a savory oyster sauce glaze and topped with crispy fried garlic — simple, elegant, and deeply satisfying.
8 ingredientsStir-fried Kai-lan with Ginger and Chili
12 minA vibrant wok-fried dish where the natural sweetness of kai-lan stems meets the heat of fresh chili and the warmth of ginger. High-heat stir-frying keeps the stems crisp-tender with a slight smoky char.
8 ingredients
Kai-lan and Beef in Black Bean Sauce
20 minA beloved Cantonese combination where thick kai-lan stems stand up perfectly to sliced beef and pungent fermented black bean sauce. The vegetable absorbs the savory-salty sauce while retaining its signature crunch.
9 ingredientsCulinary Uses
Kai-lan is a cornerstone of Cantonese cuisine. The classic preparation is blanching stems briefly then stir-frying with oyster sauce and garlic. It pairs beautifully with ginger, sesame oil, and fermented black beans. Add to noodle soups, fried rice, and steamed fish dishes. The flowers are edible and add a mild mustard flavor.
What's inside
Health Benefits
- Exceptionally high in vitamin C at 76mg per 100g — nearly twice the amount in oranges — providing powerful antioxidant protection and supporting immune function, wound healing, and iron absorption from plant foods.
- Rich in vitamin A as beta-carotene, providing 54% of the daily value per 100g, essential for maintaining healthy vision, skin integrity, and proper immune system function.
- Contains high levels of vitamin K, critical for blood clotting and bone metabolism, helping to maintain bone density and reduce the risk of fractures as we age.
- Abundant in glucosinolates — sulfur-containing compounds that break down into isothiocyanates during chewing and digestion, which have been extensively studied for their ability to support the body's natural detoxification processes and potentially inhibit cancer cell growth.
- Provides bioavailable calcium (72mg per 100g) with relatively low oxalate content compared to spinach, making kai-lan one of the better plant-based calcium sources for bone health.
- Contains significant amounts of folate, iron, and dietary fiber that work synergistically to support cardiovascular health, healthy red blood cell formation, and digestive regularity.
Where Kai-lan comes from
Kai-lan (Brassica oleracea var. alboglabra) originated in the coastal regions of southern China, where it has been cultivated for well over a millennium. The vegetable belongs to the same species as broccoli, cabbage, kale, and cauliflower, but was selected and bred along a completely different path by Chinese farmers who prized thick, sweet, juicy stems over dense flower heads or tightly wrapped leaves. Archaeological and literary evidence suggests kai-lan was well established in Cantonese agriculture by the Tang Dynasty (618-907 CE), and it became one of the defining vegetables of Guangdong Province's culinary tradition.
The vegetable's importance grew alongside the development of Cantonese cuisine, which emphasizes fresh, lightly cooked vegetables that showcase natural flavor and texture. Kai-lan became inseparable from wok cooking — its thick stems could withstand the intense heat of a blazing wok while developing a slight caramelized char, and its mild sweetness paired perfectly with oyster sauce, a condiment invented in Guangdong in the 1880s. As Cantonese emigrants spread across Southeast Asia, Australia, Europe, and North America in the 19th and 20th centuries, they brought kai-lan with them, establishing it as a staple in Chinese communities worldwide.
In 1993, kai-lan played a pivotal role in modern vegetable breeding when the Sakata Seed Company of Yokohama, Japan, crossed it with conventional broccoli to create Broccolini, a hybrid that inherited kai-lan's long, tender stems and mild sweetness. This cross-breeding success brought global attention to kai-lan's genetic value. Today, China remains by far the largest producer and consumer of kai-lan, with significant commercial cultivation in Hong Kong, Taiwan, Thailand, Malaysia, and Australia. The vegetable has gained steady popularity in Western countries, driven by the growth of Asian cuisine and increasing interest in nutrient-dense brassica vegetables.
Kai-lan: did you know?
Fascinating facts about Kai-lan
Kai-lan (Brassica oleracea var. alboglabra) is often called 'Chinese broccoli' or 'Chinese kale,' but it is actually a distinct variety of the same species that includes broccoli, kale, cabbage, and cauliflower — all bred from a single wild mustard ancestor over thousands of years.
Kai-lan questions, answered
When should I plant Kai-lan?
What are good companion plants for Kai-lan?
What hardiness zones can Kai-lan grow in?
How much sun does Kai-lan need?
How far apart should I space Kai-lan?
What pests and diseases affect Kai-lan?
How do I store Kai-lan after harvest?
What are the best Kai-lan varieties to grow?
What soil does Kai-lan need?
What is the difference between kai-lan and regular broccoli?
Why is my kai-lan flowering before the stems get thick?
Can I eat kai-lan leaves, or just the stems?
How do I prevent kai-lan stems from being tough or stringy?
Can I grow kai-lan in containers on a balcony?
Is kai-lan the same as broccolini or baby broccoli?
You just read the theory. Now grow it on autopilot.
Everything that makes Kai-lan fiddly — the timing, the spacing, the companions, the harvest window — is exactly what PlotMyGarden handles for you, for every plant in your garden.
A plan that knows your weather
Set your location once. Get sow, feed and harvest dates built around your real last-frost date and live forecast — no more guessing from a generic seed packet.
From the “When to plant” sectionDrag-and-drop bed planner
Design beds on a grid. Every plant snaps to its proper spacing, and you can see your whole season laid out before you spend a cent on seed.
From the “Growing guide” sectionCompanion conflicts, caught early
200+ good-and-bad pairings checked live as you plant — so a season-wrecking mistake never makes it into the ground.
From the “Companions” sectionReminders you'll actually act on
“Water the beans.” “Pick today before it turns.” Timely, specific, and tied to the plants you're really growing.
From the “Harvest” sectionSuccession, scheduled
Want a harvest for six weeks, not six days? It spaces your sowings automatically and reminds you when each new block is due.
From the “When to plant” sectionA record that gets smarter
Every harvest you log teaches it your garden. Next year's plan starts from what actually worked in your soil, not a textbook's.
From the “Overview” sectionPlant these alongside Kai-lan
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Start a free plan today. Lay out your beds, drop in your Kai-lan, and let PlotMyGarden handle the timing, spacing, companions and reminders from seed to harvest basket.