Crops
Onion
(Garlic onion)
- Type of vegetable : leaves, underground organs
- Optimum growth pH range: 5.6-6.9
- Optimal growth temperature range : 18-27°C
- Organic matter requirements : undemanding plant
- Rooting : superficial (45 to 60 cm)
- Special requirements : long days and average temperatures are necessary for the formation of the bulbs. Requires heat and drought for bulb maturation. Indifferent to photoperiod for flowering (does not induce low temperatures (vernalisation)). Not recommended in Mayotte for economic reasons in particular (import prices) or to favor fresh onions.
- Seed characteristics
- Number of seeds per gram : 250 - 300
- Nursery : Yes
- Sowing depth : 10 - 13 mm
- Line spacing : 25 - 40 cm
- Interplant : 12 - 20 cm
- Notes :
- Seed germination time
| 0°C | 5°C | 10°C | 15°C | 20°C | 25°C | 30°C | 35°C |
| 136 days | 50 d | 13 d | 7 d | 5 d | 4 days | 4 days | 13 d |
- Duration of the crop cycle under optimal growing conditions
| Nursery | Field |
Pollination at commercial maturity |
| 70 d | 90-150 d | - |
- Optimal storage conditions
| Temperatures | Relative humidity | Average shelf life |
| 0°C | 95-100% | 3 to 4 weeks |