🥢 Green Beans
A warm-season producer: the more you pick, the more it bears.
Green Beans at a glance
Is Green Beans frost tolerant?
No. Cold hurts it even above freezing: damage starts at 2°C and it is killed below 0°C. Sow or plant it out only after your last frost.
What temperature does Green Beans grow best in?
It grows best between 16 and 29°C. Below 10°C it stops growing altogether, and above 33°C it slows down.
How many days does Green Beans take to mature?
About 50–60 days. That is a typical figure: it needs roughly 600 °C·d of warmth above 10°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.
Is Green Beans a cool-season or warm-season crop?
A warm-season crop. It needs warm days and nights, so it goes in after the last frost, once temperatures are reliably above 16°C.
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, 32) − 10), and Green Beans is ready when that total reaches 600. That is why the same seed takes a very different number of days in Dublin and in Guangzhou.
| Base temperature | 10°CBelow this, the plant accumulates no growing degree days at all. |
|---|---|
| Degree days to maturity | 600 °C·dThe heat budget it must accumulate before it is ready to pick. |
| Comfortable range | 16–29°CWhere it grows without stress. |
| Frost damage below | 2°CLeaves start taking frost damage below this low. |
| Killed below | 0°CBelow this it does not come back. |
| Heat stress above | 33°CAbove this the plant slows down and stops setting fruit well. |
| Typical time to harvest | 50–60 days |
| Yield per bed | 22 beans |
Things worth knowing
- Pick often — pods left on the vine tell the plant its job is done and flowering stops.
- Raw green beans contain lectins and saponins; always cook them thoroughly.
Where and when to sow Green Beans
Pick your city to see the months when Green Beans scores well against that city's real climate records: