September in Biella
What to plant in September in Biella
Direct sowing, recommended transplants, and average climate risks for a vegetable garden in Biella in September.
Operational summary
Crop actions
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing8 crops | Garlic, Swiss chard, Tuscan kale, Lettuce, Pea, Radish, Arugula, Spinach | High86.12% |
| Start indoors0 crops | - | - |
| Transplants3 crops | Tuscan kale, Strawberry, Lettuce | High82% |
| Wait4 crops | Broccoli, Carrot, Onion, Sage | Low52.25% |
Direct sowing (8)
Garlicwindow: from September 1 to September 30harvest: June 1›
Swiss chardwindow: from September 1 to September 2harvest: from October 20 to October 21›
Tuscan kalewindow: from September 1 to September 10harvest: from October 25 to November 3›
Lettucewindow: from September 1 to September 15harvest: from October 5 to October 19›
Peawindow: from September 1 to September 10harvest: from October 25 to November 3›
Radishwindow: from September 1 to September 30harvest: from September 25 to October 24›
Arugulawindow: from September 1 to September 30harvest: from September 25 to October 24›
Spinachwindow: from September 1 to September 30harvest: from October 5 to November 3›
Start indoors (0)
- -
Transplants (3)
Wait (4)
Broccoliwindow: from September 1 to September 7harvest: from October 30 to November 5›
Carrotwindow: from September 1 to September 10harvest: from October 30 to November 8›
Onionwindow: from September 1 to September 2harvest: from November 29 to November 30›
Sagewindow: from September 1 to September 7harvest: from October 30 to November 5›
Crops for this month
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing8 crops | Garlicwindow: from September 1 to September 30harvest: June 1Swiss chardwindow: from September 1 to September 2harvest: from October 20 to October 21Tuscan kalewindow: from September 1 to September 10harvest: from October 25 to November 3Lettucewindow: from September 1 to September 15harvest: from October 5 to October 19Peawindow: from September 1 to September 10harvest: from October 25 to November 3Radishwindow: from September 1 to September 30harvest: from September 25 to October 24Arugulawindow: from September 1 to September 30harvest: from September 25 to October 24Spinachwindow: from September 1 to September 30harvest: from October 5 to November 3 | High86.12% |
| Start indoors0 crops | - | - |
| Transplants3 crops | Tuscan kalewindow: from September 1 to September 10harvest: from October 25 to November 3Strawberrywindow: from September 1 to September 3harvest: from October 30 to November 1Lettucewindow: from September 1 to September 15harvest: from October 5 to October 19 | High82% |
| Wait4 crops | Broccoliwindow: from September 1 to September 7harvest: from October 30 to November 5Carrotwindow: from September 1 to September 10harvest: from October 30 to November 8Onionwindow: from September 1 to September 2harvest: from November 29 to November 30Sagewindow: from September 1 to September 7harvest: from October 30 to November 5 | Low52.25% |
Direct sowing (8)
Garlicwindow: from September 1 to September 30harvest: June 1›
Swiss chardwindow: from September 1 to September 2harvest: from October 20 to October 21›
Tuscan kalewindow: from September 1 to September 10harvest: from October 25 to November 3›
Lettucewindow: from September 1 to September 15harvest: from October 5 to October 19›
Peawindow: from September 1 to September 10harvest: from October 25 to November 3›
Radishwindow: from September 1 to September 30harvest: from September 25 to October 24›
Arugulawindow: from September 1 to September 30harvest: from September 25 to October 24›
Spinachwindow: from September 1 to September 30harvest: from October 5 to November 3›
Start indoors (0)
- -
Transplants (3)
Wait (4)
Broccoliwindow: from September 1 to September 7harvest: from October 30 to November 5›
Carrotwindow: from September 1 to September 10harvest: from October 30 to November 8›
Onionwindow: from September 1 to September 2harvest: from November 29 to November 30›
Sagewindow: from September 1 to September 7harvest: from October 30 to November 5›
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.
Method and limits
Which recommendation stands out for Biella in September?
Start with Garlic for direct sowing during from September 1 to September 30. The estimated harvest is June 1 and the best estimated success rate is 93%.
How should I read September climate for Biella?
Check irrigation and soil moisture: the average dry spell reaches 9.77 days, even with average rain of 82.71 mm. Monthly averages: minimum 11.95 °C, maximum 21.48 °C, rain 82.71 mm, and dry spell 9.77 days.
Why wait on Broccoli in September?
The available Broccoli window is from September 1 to September 7 and remains classified as risky. The best estimated success rate is 50%; before starting, check: overall climate risk is moderate.
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

