🍃 Mint
So vigorous it needs to be locked up in a pot.
Mint at a glance
Is Mint frost tolerant?
Here it is grown as a windowsill pot, so frost is not part of the picture. Keep it somewhere that stays between 13 and 28°C.
What temperature does Mint grow best in?
It grows best between 13 and 28°C. Below 8°C it stops growing altogether, and above 32°C it slows down.
How many days does Mint take to mature?
About 22–30 days. That is a typical figure: it needs roughly 300 °C·d of warmth above 8°C, so a warm season gets it there sooner and a cool one later. The city calendars below give the sow and harvest dates for each place.
What the numbers mean
These are the actual parameters this game runs on. Growth is driven by growing degree days: each day contributes max(0, min(mean temp, 30) − 8), and Mint is ready when that total reaches 300. That is why the same seed takes a very different number of days in Dublin and in Guangzhou.
| Base temperature | 8°CBelow this, the plant accumulates no growing degree days at all. |
|---|---|
| Degree days to maturity | 300 °C·dThe heat budget it must accumulate before it is ready to pick. |
| Comfortable range | 13–28°CWhere it grows without stress. |
| Frost damage below | -20°CLeaves start taking frost damage below this low. |
| Killed below | -30°CBelow this it does not come back. |
| Heat stress above | 32°CAbove this the plant slows down and stops setting fruit well. |
| Typical time to harvest | 22–30 days |
| Yield per bed | 6 bunches |
Things worth knowing
- Mint's underground runners spread so fast it will conquer a whole garden bed — pots keep it honest.
- Menthol triggers the skin's cold receptor TRPM8 — mint feels cool without changing temperature at all.
Where and when to sow Mint
Pick your city to see the months when Mint scores well against that city's real climate records: