September in Formia
What to plant in September in Formia
Direct sowing, recommended transplants, and average climate risks for a vegetable garden in Formia in September.
Operational summary
Crop actions
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing12 crops | Garlic, Swiss chard, Carrot, Tuscan kale, Onion, Green bean, Fennel, Lettuce, Pea, Radish, Arugula, Spinach | High88.5% |
| Start indoors1 crop | Lettuce | High80% |
| Transplants8 crops | Broccoli, Tuscan kale, Onion, Fennel, Strawberry, Lettuce, Rosemary, Sage | High82.38% |
| Wait3 crops | Cucumber, Parsley, Zucchini | Low50% |
Direct sowing (12)
Garlicwindow: from September 1 to September 30harvest: June 1›
Swiss chardwindow: from September 1 to September 25harvest: from October 20 to November 13›
Carrotwindow: from September 1 to September 15harvest: from October 30 to November 13›
Tuscan kalewindow: from September 1 to September 29harvest: from October 25 to November 22›
Onionwindow: from September 1 to September 8harvest: from November 29 to December 6›
Green beanwindow: from September 1 to September 14harvest: from October 20 to November 2›
Fennelwindow: from September 1 to September 7harvest: from October 30 to November 5›
Lettucewindow: from September 1 to September 30harvest: from October 5 to November 3›
Start indoors (1)
Transplants (8)
Broccoliwindow: from September 1 to September 7harvest: from October 30 to November 5›
Tuscan kalewindow: from September 1 to September 29harvest: from October 25 to November 22›
Onionwindow: from September 1 to September 8harvest: from November 29 to December 6›
Fennelwindow: from September 1 to September 7harvest: from October 30 to November 5›
Strawberrywindow: from September 1 to September 24harvest: from October 30 to November 22›
Lettucewindow: from September 1 to September 30harvest: from October 5 to November 3›
Rosemarywindow: from September 1 to September 7harvest: from October 30 to November 5›
Sagewindow: from September 1 to September 7harvest: from October 30 to November 5›
Wait (3)
Crops for this month
| Action | Crops | Success probability |
|---|---|---|
| Direct sowing12 crops | Garlicwindow: from September 1 to September 30harvest: June 1Swiss chardwindow: from September 1 to September 25harvest: from October 20 to November 13Carrotwindow: from September 1 to September 15harvest: from October 30 to November 13Tuscan kalewindow: from September 1 to September 29harvest: from October 25 to November 22Onionwindow: from September 1 to September 8harvest: from November 29 to December 6Green beanwindow: from September 1 to September 14harvest: from October 20 to November 2Fennelwindow: from September 1 to September 7harvest: from October 30 to November 5Lettucewindow: from September 1 to September 30harvest: from October 5 to November 3Peawindow: from September 1 to September 29harvest: from October 25 to November 22Radishwindow: 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 | High88.5% |
| Start indoors1 crop | Lettucestart indoors: March 21harvest: from May 22 to November 5 | High80% |
| Transplants8 crops | Broccoliwindow: from September 1 to September 7harvest: from October 30 to November 5Tuscan kalewindow: from September 1 to September 29harvest: from October 25 to November 22Onionwindow: from September 1 to September 8harvest: from November 29 to December 6Fennelwindow: from September 1 to September 7harvest: from October 30 to November 5Strawberrywindow: from September 1 to September 24harvest: from October 30 to November 22Lettucewindow: from September 1 to September 30harvest: from October 5 to November 3Rosemarywindow: from September 1 to September 7harvest: from October 30 to November 5Sagewindow: from September 1 to September 7harvest: from October 30 to November 5 | High82.38% |
| Wait3 crops | Low50% |
Direct sowing (12)
Garlicwindow: from September 1 to September 30harvest: June 1›
Swiss chardwindow: from September 1 to September 25harvest: from October 20 to November 13›
Carrotwindow: from September 1 to September 15harvest: from October 30 to November 13›
Tuscan kalewindow: from September 1 to September 29harvest: from October 25 to November 22›
Onionwindow: from September 1 to September 8harvest: from November 29 to December 6›
Green beanwindow: from September 1 to September 14harvest: from October 20 to November 2›
Fennelwindow: from September 1 to September 7harvest: from October 30 to November 5›
Lettucewindow: from September 1 to September 30harvest: from October 5 to November 3›
Start indoors (1)
Transplants (8)
Broccoliwindow: from September 1 to September 7harvest: from October 30 to November 5›
Tuscan kalewindow: from September 1 to September 29harvest: from October 25 to November 22›
Onionwindow: from September 1 to September 8harvest: from November 29 to December 6›
Fennelwindow: from September 1 to September 7harvest: from October 30 to November 5›
Strawberrywindow: from September 1 to September 24harvest: from October 30 to November 22›
Lettucewindow: from September 1 to September 30harvest: from October 5 to November 3›
Rosemarywindow: from September 1 to September 7harvest: from October 30 to November 5›
Sagewindow: from September 1 to September 7harvest: from October 30 to November 5›
Wait (3)
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.
Method and limits
Which crop has the clearest window in September in Formia?
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 100%.
Which crop can be started indoors in September?
For Lettuce, the useful indoor seed period is from March 21 to September 4. The expected transplanting window is from April 18 to October 2 and it is best to start seedlings 28 days earlier.
What should I watch in September in Formia?
Check irrigation and soil moisture: the average dry spell reaches 9.07 days, even with average rain of 69.04 mm. Monthly averages: minimum 14.53 °C, maximum 25.88 °C, rain 69.04 mm, and dry spell 9.07 days.
What makes Cucumber cautious this month?
The available Cucumber window is from September 1 to September 5 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



