How to Grow Baby Bok Choy (Tat Soi)
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Baby Bok Choy (Tat Soi)
Brassica rapa subsp. narinosa
vegetableTat Soi is a compact Asian brassica with dark green, spoon-shaped leaves arranged in a rosette pattern and a tender, mild flavor. It matures quickly (30-45 days) and is ideal for small spaces, containers, and succession planting. The entire plant is edible, from the tender leaves to the crisp stems.
When should you plant Baby Bok Choy (Tat Soi) in your zone?
Get a personalized planting timeline — when to start seeds, transplant, and harvest — based on your USDA zone and local frost dates. Free to start.
Example Baby Bok Choy (Tat Soi) timeline · Pittsburgh, PA (Zone 6b)
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Plant Baby Bok Choy (Tat Soi)
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 Baby Bok Choy (Tat Soi)
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Baby Bok Choy (Tat Soi) dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 3-9; grows best as a cool-season crop in spring and fall
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Get my Baby Bok Choy (Tat Soi) timeline →Growth Stages
Seedling
7-10 daysTiny cotyledons emerge, followed by the first true leaves. Plant is delicate and low to the ground.
Keep soil consistently moist. Provide bright light and maintain 60-70°F. Thin seedlings to proper spacing when 2-3 true leaves appear.
Vegetative Growth
15-25 daysSpoon-shaped leaves develop and expand. Plant grows outward in a rosette formation with minimal stem elongation.
Maintain consistent moisture and provide steady temperatures. Fertilize with balanced fertilizer (10-10-10) every 2-3 weeks. Monitor for pests regularly.
Baby Maturity
5-10 daysPlant reaches 4-6 inches tall with 6-10 tender leaves. Perfect size for harvesting as 'baby' bok choy with mild, sweet flavor.
Can harvest at this stage for baby greens. Harvest outer leaves or entire plant depending on preference. Water regularly but don't overwater.
Full Maturity
15-20 days after baby stagePlant grows to 8-12 inches tall with thicker stems and more pronounced white midribs. Leaves remain tender but are larger and more substantial.
Continue harvesting outer leaves to encourage growth or harvest entire plant. Keep watering consistent to prevent bolting in warm weather.
Senescence/Bolting
Variable, triggered by temperature and day lengthPlant begins sending up flower stalks (bolting), especially in heat or longer days. Leaves become tougher and more bitter.
Harvest immediately once bolting begins. In hot climates, plan succession planting for spring/fall crops rather than summer.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Handpick; use floating row covers; apply Bacillus thuringiensis (Bt) spray; encourage beneficial insects like parasitic wasps
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Use row covers on young plants; spray neem oil or insecticidal soap; dust with diatomaceous earth; trap with yellow sticky cards
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Strong water spray to dislodge; insecticidal soap; neem oil; encourage ladybugs and lacewings
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Yellow sticky traps; reflective mulch; insecticidal soap; neem oil
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and
Handpick at dusk; beer traps; copper tape barriers; diatomaceous earth; encourage natural predators like ground beetles
Uses
Stir-frying and Asian cooking
CulinaryThe tender leaves and crisp stems are perfect for quick stir-frying with garlic, ginger, and soy sauce. Baby bok choy retains its mild, slightly sweet flavor even with high-heat cooking. [source]
Raw salads and fresh eating
CulinaryYoung, tender baby bok choy leaves work well in fresh green salads, slaws, and as nutritious salad bases with a mild, pleasant crunch. [source]
Soups and braised dishes
CulinaryBaby bok choy adds delicate texture and nutrition to Asian soups, broths, and braised vegetable medleys. It cooks quickly without losing its tender quality. [source]
Nutritional supplementation
MedicinalRich in vitamins A, C, and K, plus calcium and antioxidants. Often consumed as a nutrient-dense green vegetable to support bone health and immune function. [source]
Container and urban gardening
HouseholdPerfect for pots, window boxes, and small-space gardens. Quick growth and compact size make it ideal for balcony gardening and succession planting in containers. [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 baby bok choy at 30-45 days when plants are 4-6 inches tall for peak tenderness and mild flavor. Cut entire plant 1 inch above soil level with a knife, or harvest outer leaves while allowing the plant to continue producing. Morning harvest yields the crispest leaves. For repeated harvests from the same plant, pinch off outer leaves as needed.
Fun Facts
- 🌱 Tat Soi means 'edible greens' in Cantonese and is a staple in Chinese and Southeast Asian cuisines for centuries, prized for its rapid growth and mild taste.
- 🌱 Unlike larger bok choy, tat soi (baby bok choy) can produce multiple harvests from a single plant if you continually pick outer leaves, extending your harvest window over several weeks.
- 🌱 Bok choy is one of the fastest-growing brassicas and can be ready to harvest in just 30 days from seed, making it perfect for impatient gardeners or as a quick succession crop between slower vegetables.
Gardening Terms
New to gardening? Learn about terms used in this guide:
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