January in Formia
What to plant in January in Formia
Direct sowing, recommended transplants, and average climate risks for a vegetable garden in Formia in January.
Operational summary
Crop actions
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing0 crops | - | - |
| Start indoors1 crop | Onion | High83% |
| Transplants0 crops | - | - |
| Wait0 crops | - | - |
Direct sowing (0)
- -
Start indoors (1)
Transplants (0)
- -
Wait (0)
- -
Crops for this month
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing0 crops | - | - |
| Start indoors1 crop | Onionstart indoors: January 7harvest: from June 21 to December 6 | High83% |
| Transplants0 crops | - | - |
| Wait0 crops | - | - |
Direct sowing (0)
- -
Start indoors (1)
Transplants (0)
- -
Wait (0)
- -
Local climate
Altitude and microclimates
- Altitude range
- -1-1388 m a.s.l.
- Total altitude difference
- 1389 m
- Standard deviation
- 386.06 m
- Main altitude bands
- <300 m (47.6%), 600-899 m (20.03%)
In a municipality with this much terrain variation, frost, soil warming, and heat stress can differ between valley or lowland gardens and higher hamlets. Use this month's windows as an average guide and adjust sowing and transplanting to the garden's actual altitude.
- cold risk for sensitive sowing
Method and limits
Which indoor seed start matters in January?
For Onion, the useful indoor seed period is from January 7 to June 23. The expected transplanting window is from March 24 to September 8 and it is best to start seedlings 77 days earlier.
What should I watch in January in Formia?
Check night minimums and frost risk: with an average minimum of 1.79 °C, sensitive sowings and transplants need protection. Check irrigation and soil moisture: the average dry spell reaches 11.1 days, even with average rain of 76.02 mm. Monthly averages: minimum 1.79 °C, maximum 9.54 °C, rain 76.02 mm, and dry spell 11.1 days.
Sources and limits
Use these dates as practical guidance, not fixed deadlines. Exposure, soil, containers, irrigation, and the next few days' forecast can move the right timing earlier or later.
- Municipality registry: ISTAT
- Municipal altimetry and altitude bands: ISTAT geographic statistics for municipalities 2021
- Local historical climate: NASA POWER Daily API
- Representative weather point: GeoNames
- Crop needs: OrtoClima
- Last data update: June 21, 2026

