🥒 Luffa
A ferociously fast vine — centimetres a day — that needs a solid frame and a lot of water.
🌱 This one is in the reference and the planting calendar, but you cannot sow it in the game yet.
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, 35) − 12), and Luffa is ready when that total reaches 1220. That is why the same seed takes a very different number of days in Dublin and in Guangzhou.
| Base temperature | 12°CBelow this, the plant accumulates no growing degree days at all. |
|---|---|
| Degree days to maturity | 1220 °C·dThe heat budget it must accumulate before it is ready to pick. |
| Comfortable range | 18–33°CWhere it grows without stress. |
| Frost damage below | 4°CLeaves start taking frost damage below this low. |
| Killed below | 1°CBelow this it does not come back. |
| Heat stress above | 36°CAbove this the plant slows down and stops setting fruit well. |
| Typical time to harvest | 75–100 days |
| Yield per bed | 12 fruits |
Things worth knowing
- Picked young it is a vegetable; left to mature the fibres lignify and dry into a bath sponge.
- The vine can put on more than ten centimetres in a day, among the fastest of any common vegetable.
Where and when to sow Luffa
Pick your city to see the months when Luffa scores well against that city's real climate records: