Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Blackberry — Growing reference
| Scientific name | Rubus allegheniensis |
|---|---|
| First harvest or flowering (days) | 365–548 |
| Measured from | Transplant |
| Plant spacing (cm) | 91.4–152.4 |
| Mature height (cm) | 91.4–243.8 |
| Mature spread (cm) | 91.4–182.9 |
| USDA hardiness zones | 5–10 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Transplant |
Growing directions
Blackberries fruit on second-year floricanes; remove all fruited canes at the base after harvest and thin new primocanes to 4–6 per hill. Erect types can be tip-pruned at 3–4 ft in midsummer to encourage lateral branching and larger yields. Harvest when berries are fully black, slightly soft, and the white core is not visible — they do not ripen further off the plant. Trailing cultivars require a T-trellis; thornless varieties are easier to manage but may be less cold-hardy.
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