Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Celery — Growing reference
| Scientific name | Apium graveolens var. dulce |
|---|---|
| Seed germination (days) | 10–21 |
| Soil temperature for germination (°C) | 15.6–23.9 |
| First harvest or flowering (days) | 100–130 |
| Measured from | Transplant |
| Plant spacing (cm) | 25.4–30.5 |
| Mature height (cm) | 45.7–61 |
| Mature spread (cm) | 25.4–30.5 |
| USDA hardiness zones | 2–10 |
| Light | Full sun |
| Water | High |
| Sowing method | indoor-start |
Growing directions
Surface-sow or barely cover tiny seed with 1/8 in of moist mix; celery germinates slowly and needs consistent warmth and bright light from the start. Transplant into deeply prepared, rich soil and provide consistent, abundant moisture throughout the season, as drought quickly causes tough, stringy stalks. Hill soil around the base or use collars to blanch stalks to a paler color and milder flavor if desired. Harvest entire plants by cutting at soil level when stalks are 12–18 in tall and firm.
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