Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Orange — Growing reference
| Scientific name | Citrus sinensis |
|---|---|
| First harvest or flowering (days) | 1460–2555 |
| Measured from | Transplant |
| Plant spacing (cm) | 365.8–609.6 |
| Mature height (cm) | 304.8–609.6 |
| Mature spread (cm) | 304.8–548.6 |
| USDA hardiness zones | 9–11 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Transplant |
Growing directions
Sweet oranges (Citrus sinensis) are self-fertile; navel oranges and many blood oranges are seedless because they are parthenocarpic. Most oranges need warm nights to develop sweetness and cannot be grown outdoors north of zone 9; the Hamlin and Navel types are slightly more cold-tolerant. Fruit can stay on the tree for weeks to months after ripening, extending harvest, but may re-green in warm weather without losing quality. Apply a balanced citrus fertilizer in late winter, late spring, and midsummer for best production.
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