Last frost in Firenze: likely and cautious dates
Reference dates for frost risk in Firenze.
Last frost in Firenze
This page summarizes the historical frost dates that are most useful for deciding when to sow and transplant in Firenze.
Reference dates
| indicator | date |
|---|---|
| Median last frost 0C | March 30 |
| Cautious last frost 0C | April 16 |
| Median last frost 2C | April 15 |
| Cautious last frost 2C | April 24 |
| Cautious first autumn frost 0C | October 30 |
| Cautious first autumn frost 2C | October 21 |
Last 10 available years
The table shows, for each available year, the last date between January and June when the daily minimum was at or below 0C.
| year | last date <= 0C | minimum |
|---|---|---|
| 2020 | April 4 | -0.49 C |
| 2019 | March 28 | -0.01 C |
| 2018 | March 26 | -2.37 C |
| 2017 | April 21 | -0.78 C |
| 2016 | March 25 | -0.1 C |
| 2015 | April 20 | -1.04 C |
| 2014 | March 12 | -1.52 C |
| 2013 | April 8 | -0.68 C |
| 2012 | April 9 | -2.91 C |
| 2011 | March 23 | -1.1 C |
Difference between 0C and 2C
What to sow before the cautious date
- Swiss chard
- Carrot
- Tuscan kale
- Onion
- Strawberry
- Pea
- Radish
- Arugula
- Spinach
What to sow after the cautious date
- Garlic
- Swiss chard
- Broccoli
- Carrot
- Tuscan kale
- Cucumber
- Onion
- Green bean
- Fennel
- Strawberry
- Lettuce
- Potato
Sensitive crops
FAQ
Which date should I use for sensitive transplants in Firenze?
The most cautious date on this page is April 24 on the 2C threshold. For sensitive crops, use it as the reference before moving sowing or transplanting earlier.
Why also look at the 2C threshold?
The median 0C date is March 30, while the cautious 2C date is April 24. The 2C threshold is more cautious for cold nights, inversions, and exposed spots.
Does the frost date apply everywhere in Firenze?
No. In Firenze, exposure, elevation, wind, and soil can move real risk earlier or later than the representative municipality point.
Which crops are most sensitive near the last frost?
In the local rules, the more sensitive crops include: Basil, Swiss chard, Broccoli, Carrot, Tuscan kale, Cucumber. For these crops, the cautious date and night protection matter more.