Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Nemesia — Growing reference
| Scientific name | Nemesia strumosa |
|---|---|
| Seed germination (days) | 7–14 |
| Soil temperature for germination (°C) | 15.6–18.3 |
| First harvest or flowering (days) | 50–70 |
| Measured from | Transplant |
| Plant spacing (cm) | 15.2–22.9 |
| Mature height (cm) | 20.3–35.6 |
| Mature spread (cm) | 15.2–22.9 |
| USDA hardiness zones | 2–11 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | indoor-start |
Growing directions
Sow seeds 1/8 in deep in fine-textured germination mix at 60–65°F; avoid higher temperatures as heat inhibits germination. Plant outdoors in cool weather in a spot with morning sun and afternoon shade where summers are hot. Nemesia blooms prolifically in cool conditions with cheerful two-toned flowers in a huge range of colors; it typically falters in summer heat so shear back and move containers to a cooler spot. Plants may revive and rebloom in fall when temperatures drop again.
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