Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Crocus — Growing reference
| Scientific name | Crocus spp. |
|---|---|
| First harvest or flowering (days) | 120–180 |
| Measured from | Transplant |
| Plant spacing (cm) | 7.6–10.2 |
| Mature height (cm) | 10.2–15.2 |
| Mature spread (cm) | 7.6–10.2 |
| USDA hardiness zones | 3–8 |
| Light | Full sun |
| Water | Low |
| Sowing method | Bulb |
Growing directions
Plant corms pointed side up at a depth of 3–4 in in well-drained soil; they naturalize quickly and look best planted in large, informal drifts. Squirrels frequently dig freshly planted corms, so covering the bed with wire mesh until the ground freezes can protect plantings. Foliage is narrow and grassy; allow it to die back completely before removing. Species crocus tend to be more reliably perennial than large-flowered Dutch types.
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