Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Pansy — Growing reference
| Scientific name | Viola × wittrockiana |
|---|---|
| Seed germination (days) | 10–14 |
| Soil temperature for germination (°C) | 18.3–21.1 |
| First harvest or flowering (days) | 60–80 |
| Measured from | Transplant |
| Plant spacing (cm) | 15.2–25.4 |
| Mature height (cm) | 15.2–30.5 |
| Mature spread (cm) | 15.2–25.4 |
| USDA hardiness zones | 3–10 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | indoor-start |
Growing directions
Sow seed 1/8 in deep in a moist starting mix; cover the tray with dark plastic as darkness aids germination. Transplant outdoors several weeks before the last frost, as cool weather brings out the richest colors and most abundant bloom. Deadhead spent flowers regularly to prevent seed set, which stops flowering. Plants decline as summer heat arrives; remove and replace with heat-tolerant annuals.
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