Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Komatsuna — Growing reference
| Scientific name | Brassica rapa var. perviridis |
|---|---|
| Seed germination (days) | 4–7 |
| Soil temperature for germination (°C) | 7.2–26.7 |
| First harvest or flowering (days) | 30–45 |
| Measured from | Seed |
| Plant spacing (cm) | 10.2–20.3 |
| Mature height (cm) | 20.3–35.6 |
| Mature spread (cm) | 10.2–20.3 |
| USDA hardiness zones | 3–11 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Direct sow |
Growing directions
Sow seeds 1/4 inch deep, thinning to 4 inches for baby greens or 8 inches for full-sized plants. Komatsuna is one of the most versatile Asian brassicas — milder than mustard, more heat-tolerant than spinach, and remarkably cold-hardy. Begin harvesting at 30 days for tender salad leaves, or allow plants to reach full size at 8–14 inches for stir-frying and braising. Water consistently to keep leaves mild and succulent.
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