December in Biella
What to plant in December in Biella
Direct sowing, recommended transplants, and average climate risks for a vegetable garden in Biella in December.
Operational summary
Crop actions
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing0 crops | - | - |
| Start indoors0 crops | - | - |
| Transplants0 crops | - | - |
| Wait1 crop | Garlic | Medium55% |
Direct sowing (0)
- -
Start indoors (0)
- -
Transplants (0)
- -
Wait (1)
Crops for this month
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing0 crops | - | - |
| Start indoors0 crops | - | - |
| Transplants0 crops | - | - |
| Wait1 crop | Garlicwindow: from December 1 to December 7harvest: June 1 | Medium55% |
Direct sowing (0)
- -
Start indoors (0)
- -
Transplants (0)
- -
Wait (1)
Local climate
Altitude and microclimates
- Altitude range
- 317-2370 m a.s.l.
- Total altitude difference
- 2053 m
- Standard deviation
- 551.63 m
- Main altitude bands
- 300-599 m (53.4%), 1500-1999 m (13.52%)
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
What limits December most in Biella?
Check night minimums and frost risk: with an average minimum of -0.82 °C, sensitive sowings and transplants need protection. Check irrigation and soil moisture: the average dry spell reaches 11.93 days, even with average rain of 53.48 mm. Monthly averages: minimum -0.82 °C, maximum 5.61 °C, rain 53.48 mm, and dry spell 11.93 days.
Why wait on Garlic in December?
The available Garlic window is from December 1 to December 7 and remains classified as risky. The best estimated success rate is 55%; before starting, check: cold risk for sensitive sowing.
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

