Thai Basil — Growing reference
| Scientific name | Ocimum basilicum var. thyrsiflora |
|---|---|
| Seed germination (days) | 5–10 |
| Soil temperature for germination (°C) | 18.3–29.4 |
| First harvest or flowering (days) | 60–75 |
| Measured from | Transplant |
| Plant spacing (cm) | 30.5–45.7 |
| Mature height (cm) | 30.5–61 |
| Mature spread (cm) | 30.5–45.7 |
| USDA hardiness zones | 2–11 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | indoor-start |
Growing directions
Sow seeds 1/4 in deep in warm starting mix and transplant after the last frost when soil has warmed; Thai basil withstands heat slightly better than sweet basil. The glossy, dark-green leaves with purple stems carry a spicy anise-clove flavor that holds up better during cooking than sweet basil, making it ideal for stir-fries, curries, and pho. Pinch out purple flower spikes as they emerge to maintain vigorous leaf production, though the flowers are edible and attractive to pollinators. Harvest stems above a leaf node; plants branch densely and remain productive throughout the warm season.
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