Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Zucchini — Growing reference
| Scientific name | Cucurbita pepo |
|---|---|
| Seed germination (days) | 4–10 |
| Soil temperature for germination (°C) | 15.6–35 |
| First harvest or flowering (days) | 45–60 |
| Measured from | Seed |
| Plant spacing (cm) | 61–91.4 |
| Mature height (cm) | 45.7–91.4 |
| Mature spread (cm) | 61–121.9 |
| USDA hardiness zones | 3–10 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Direct sow |
Growing directions
Sow seeds 1 inch deep in warm, compost-enriched soil arranged in hills of 2–3 seeds, then thin to the strongest plant. Water at the soil level rather than overhead to reduce the risk of powdery mildew, which is the most common problem. Check plants daily once fruiting begins, as zucchini grows very rapidly. Harvest fruits at 6–8 inches for the best texture, leaving a short stem attached.
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