Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Tatsoi — Growing reference
| Scientific name | Brassica rapa var. narinosa |
|---|---|
| Seed germination (days) | 4–7 |
| Soil temperature for germination (°C) | 7.2–23.9 |
| First harvest or flowering (days) | 45–50 |
| Measured from | Seed |
| Plant spacing (cm) | 15.2–30.5 |
| Mature height (cm) | 10.2–20.3 |
| Mature spread (cm) | 20.3–30.5 |
| USDA hardiness zones | 3–10 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Direct sow |
Growing directions
Sow seeds 1/4 inch deep and thin to 6–12 inches for full rosettes; closer spacing produces baby greens for salad mix. Tatsoi forms a flat, ground-hugging rosette of dark spoon-shaped leaves and is remarkably cold-hardy, surviving temperatures into the low 20s°F under row cover. Harvest whole plants when 4–6 inches across or pick outer leaves progressively. Avoid planting in summer as heat causes immediate bolting.
Source and local conditions
Typical planning ranges from OpenPlantDB (CC0). Cultivar, climate, season and growing method can change these values. Confirm the seed label and local guidance before planting.
Source & verification
OpenPlantDB · CC0