Tatsoi
Brassica Rapa Narinosa
Tatsoi, also known as Spoon Mustard, is a versatile leafy green from the Brassicaceae family. Originating from East Asia, it is prized for its tender, spoon-shaped leaves and mild flavor, making it a favorite in salads and stir-fries.
Everything it needs
9 essentials at a glance
Watering
Tatsoi prefers consistently moist soil but should not be waterlogged.
Water deeply once a week, adjusting to twice a week during hot, dry spells. Signs of over-watering include yellowing leaves and root rot, while under-watering may cause wilting and leaf drop.
Light
Tatsoi thrives in full sun to partial shade, ideally receiving 6-8 hours of sunlight daily.
It can tolerate some shade, especially in hotter climates, but too much shade may slow growth and reduce yield.
Soil
The ideal soil for Tatsoi is well-draining, rich in organic matter, with a pH range of 6.0 to 7.0.
A recommended potting mix includes compost, peat moss, and perlite to ensure good drainage and nutrient content.
Humidity
Tatsoi prefers moderate humidity levels around 50-70%.
To increase humidity, consider misting the leaves or placing a humidifier nearby. Signs of low humidity include browning leaf tips and stunted growth.
Temperature
Tatsoi grows best in cooler temperatures, ideally between 50°F to 70°F (10°C to 21°C).
It is hardy in USDA zones 3-9 and can tolerate light frost, making it suitable for early spring and fall planting.
Fertilizing
Use a balanced fertilizer with an NPK ratio of 10-10-10 or similar.
Fertilize every 4-6 weeks during the growing season, especially if the soil is low in nutrients. Signs of nutrient deficiency include yellowing leaves and poor growth.
Pruning
Pruning is not typically necessary for Tatsoi.
However, you can remove any yellow or damaged leaves to promote healthy growth. Harvesting leaves regularly encourages new growth and prevents bolting.
Repotting
If grown in pots, repot Tatsoi when it outgrows its container, usually every 1-2 years.
Signs it needs repotting include roots growing out of the drainage holes and stunted growth. Use a slightly larger pot with fresh potting mix.
Propagation
Tatsoi is best propagated from seeds.
Sow seeds directly in the garden or in pots ¼ inch deep, spaced 12 inches apart. The best time to plant is in early spring or late summer for a fall harvest.
When it's unhappy
Yellow leaves
Why it happens
Often caused by over-watering or nutrient deficiency.
How to fix it
Check soil moisture and reduce watering frequency. Fertilize with a balanced fertilizer if nutrient deficiency is suspected.
Bolting
Why it happens
Occurs when temperatures rise or the plant is stressed.
How to fix it
Provide consistent watering and shade during hot weather to prevent bolting.
Pests (aphids, cabbage worms)
Why it happens
Common pests that are attracted to Brassica family plants.
How to fix it
Inspect plants regularly and use insecticidal soap or neem oil to control infestations.
Root rot
Why it happens
Caused by overly wet soil and poor drainage.
How to fix it
Ensure proper drainage and reduce watering frequency. Remove affected plants to prevent spread.
Leaf spot
Why it happens
Fungal disease often due to high humidity and poor air circulation.
How to fix it
Improve air circulation around plants and avoid overhead watering. Remove affected leaves.
Care through the year
Spring
In spring, sow seeds directly in the garden or pots. Ensure consistent moisture and protect young plants from late frosts.
Summer
During summer, provide shade during peak heat and water more frequently to prevent stress. Harvest leaves regularly to encourage growth.
Fall
In fall, continue to harvest leaves and consider planting a second crop if the weather remains mild. Protect plants from frost as needed.
Winter
In winter, if grown in pots, move them indoors or to a sheltered location to protect from freezing temperatures. Water sparingly.
Toxicity & Safety
Tatsoi is non-toxic to pets and children. It is safe to consume and poses no known health risks.
Good to know
How often should I water my Tatsoi?
Water your Tatsoi deeply once a week, increasing to twice a week during hot weather. Ensure the soil remains consistently moist but not soggy.
What is the best temperature for growing Tatsoi?
Tatsoi thrives in cooler temperatures between 50°F to 70°F (10°C to 21°C) and can tolerate light frost, making it ideal for spring and fall planting.
Why are my Tatsoi leaves turning yellow?
Yellowing leaves can indicate over-watering or nutrient deficiency. Check the soil moisture and consider fertilizing if nutrients are lacking.
How can I prevent bolting in Tatsoi?
To prevent bolting, provide consistent watering and some shade during hot weather. Harvest leaves regularly to encourage new growth.
What pests should I watch out for on my Tatsoi?
Common pests include aphids and cabbage worms. Regularly inspect your plants and use insecticidal soap or neem oil if you notice infestations.
When is the best time to plant Tatsoi seeds?
The best time to plant Tatsoi seeds is in early spring or late summer for a fall harvest. They prefer cooler growing conditions.
Can I grow Tatsoi in containers?
Yes, Tatsoi can be successfully grown in containers. Ensure the pot has good drainage and use a quality potting mix for best results.
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