Climate matters. This page is a practical baseline. Confirm cultivar, local frost/heat conditions, mature size and regional restrictions before planting.
Hyacinth — Growing reference
| Scientific name | Hyacinthus orientalis |
|---|---|
| First harvest or flowering (days) | 150–210 |
| Measured from | Transplant |
| Plant spacing (cm) | 15.2–20.3 |
| Mature height (cm) | 25.4–35.6 |
| Mature spread (cm) | 15.2–20.3 |
| USDA hardiness zones | 4–8 |
| Light | Full sun |
| Water | Moderate |
| Sowing method | Bulb |
Growing directions
Plant bulbs at a depth of 6–8 in (about 3 times the bulb height) in well-drained soil with the pointed end up; wear gloves as the bulb sap can irritate sensitive skin. Hyacinths produce their most spectacular, dense spikes in year 1; subsequent years yield looser, more relaxed flower clusters that many gardeners find charming. Allow foliage to yellow completely before removing it so the bulb can replenish its energy. In warm climates (zones 8+), lift and chill bulbs for 6 weeks before replanting.
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