Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Rosemary — Growing reference
| Scientific name | Salvia rosmarinus |
|---|---|
| Seed germination (days) | 14–28 |
| Soil temperature for germination (°C) | 18.3–23.9 |
| First harvest or flowering (days) | 120–200 |
| Measured from | Seed |
| Plant spacing (cm) | 45.7–61 |
| Mature height (cm) | 61–121.9 |
| Mature spread (cm) | 45.7–91.4 |
| USDA hardiness zones | 7–11 |
| Light | Full sun |
| Water | Low |
| Sowing method | indoor-start |
Growing directions
Rosemary is an aromatic Mediterranean perennial with needle-like leaves that bring a warm, piney flavor to roasts, breads, and herb blends. Start seed indoors ten or more weeks early and be patient, as germination is slow and often spotty. Transplant into sharply drained soil in full sun, since rosemary dislikes wet feet, and water only when the soil dries. In colder climates grow it in a pot and bring it indoors before hard frost, as it is only reliably hardy in mild zones.
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