Green Tatsoi Microgreen Seeds

Green Tatsoi is a fast-growing microgreen with tender pale-green stems, rich green foliage and a mild brassica flavour with subtle mustard and sweet notes. It requires no pre-soaking and can generally be harvested in approximately 10–14 days.

What You Need

• Green Tatsoi Microgreen Seeds
• A shallow tray with drainage holes
• A solid lower tray for bottom watering
• Coco coir, fine seed-raising mix or another suitable microgreen growing medium
• Clean drinking-quality water
• Fine mist sprayer
• A second tray or suitable blackout cover
• Bright natural light or suitable grow lights
• Clean scissors or a sharp harvesting knife

Seed Rate

For a standard 25 × 50cm microgreen tray, use approximately:

10–12g dry seed per tray

Spread the seed evenly across the growing surface and avoid dense clumps.

Pre-Soak

No pre-soaking required.

Sow Green Tatsoi seed dry directly onto the prepared growing medium.

Step-by-Step Instructions

1. Clean and thoroughly rinse trays, covers and growing tools.
2. Add approximately 2–3cm of coco coir, fine seed-raising mix or another suitable growing medium.
3. Moisten the medium evenly and allow excess water to drain.
4. Spread approximately 10–12g of dry seed evenly across the surface.
5. Gently press the seed into contact with the growing medium.
6. Mist lightly with clean drinking-quality water.
7. Cover with another tray or suitable blackout cover.
8. Keep covered for approximately 2–3 days.
9. Remove the cover once most seedlings have germinated and are beginning to push upward.
10. Move the tray into bright indirect natural light or beneath suitable grow lights.
11. Maintain good airflow.
12. Bottom water once the roots establish.
13. Harvest at approximately 10–14 days.

Blackout

Keep the tray covered for approximately:

2–3 days

Light tray pressure can help maintain good seed-to-medium contact, but heavy weighting is unnecessary.

Remove the cover promptly once the crop establishes.

For more information, see Microgreen Blackout Explained.

Germination

Expect germination in approximately:

3–7 days

Tatsoi generally establishes quickly under suitable conditions.

Maintain even moisture without keeping the growing medium permanently saturated.

Temperature

Aim for approximately:

18–24°C

Tatsoi performs well under cool to moderate growing conditions.

Light & True-Leaf Development

Once uncovered, provide bright indirect natural light or suitable grow lights.

The crop begins with rounded green cotyledons and later develops darker, spoon-shaped true leaves.

Allowing the first true leaves to begin forming can produce:

• a more recognisable Tatsoi appearance;
• darker green foliage;
• a slightly more substantial crop; and
• continued mild flavour.

Watering

During early germination, mist gently if required.

Once roots establish, bottom watering is preferable.

For detailed guidance, see How to Water Microgreens: Misting vs Bottom Watering.

Keep the growing medium consistently moist without leaving standing water beneath the tray.

Harvest & Storage

Harvest approximately:

10–14 days from sowing

Green Tatsoi microgreens are generally ready when:

• cotyledons are fully open;
• foliage is healthy green;
• stems remain tender;
• shoots are approximately 4–7cm tall; and
• early true leaves may be beginning to develop.

Cut cleanly just above the growing medium using clean scissors or a sharp harvesting knife.

For more detailed guidance, see How to Harvest & Store Microgreens.

Refrigerate promptly in a clean container. If washed before refrigeration, drain and dry thoroughly first.

Green Tatsoi vs Purple Tatsoi

Green Tatsoi produces fresh green foliage with a mild brassica flavour.

For a darker crop with purple-toned foliage and stronger visual contrast, see Purple Tatsoi Microgreen Seeds.

Root Hairs vs Mould

Fine white root hairs can sometimes be mistaken for mould.

Root hairs generally:

• grow directly from individual roots;
• appear relatively evenly; and
• become less noticeable immediately after watering.

Mould is more likely to:

• spread irregularly between seedlings;
• form web-like patches;
• persist after watering; or
• occur alongside slime, discolouration or unpleasant smells.

If you are uncertain, see Mould vs Root Hairs on Sprouts & Microgreens.

Discard crops showing obvious spoilage.

Growing Green Tatsoi as Baby Leaf

For baby-leaf production:

1. Sow at a substantially lower density than for microgreens.
2. Allow individual plants more room.
3. Continue growing beyond the microgreen stage.
4. Maintain consistent moisture.
5. Provide good light.
6. Harvest tender leaves progressively.

Growing Green Tatsoi to Maturity

Tatsoi can also be grown into mature rosettes.

For mature plants:

1. Direct sow or raise seedlings.
2. Sow approximately 5–6mm deep.
3. Thin or transplant plants to approximately 20cm apart.
4. Allow approximately 30–40cm between rows.
5. Grow in fertile, well-drained soil.
6. Provide full sun to partial shade.
7. Maintain consistent moisture.

Clean Growing / Food Safety

Use clean trays, fresh growing medium, drinking-quality water and clean harvesting equipment.

Maintain good drainage, controlled moisture and adequate airflow.

Discard microgreens showing mould, slime, decay, abnormal discolouration or unpleasant smells.

Seed Storage

Store unused Green Tatsoi seed sealed in a cool, dry and dark place away from heat, moisture and direct sunlight.

For longer-term storage, refrigeration can help maintain viability. Keep refrigerated seed sealed while it returns to room temperature before opening to reduce condensation.