Last edited by shiny on November 08, 2026. View history
Dragon Tongue Bean
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- seed packets
Dragon tongue bean facts
Lifespan
Crop cycle
Max altitude
Optimal light
What are growing degree days?
A plant grows with warmth, not with days. A growing degree day is one day's worth of useful warmth: how many degrees the day's average temperature is above the lowest temperature the crop grows at. Add them up from planting and you know how far along the crop is, whatever the calendar says.
Say that lowest temperature is 10°C. A day averaging 17°C gives 7 growing degree days. A day averaging 8°C gives none, as it is too cold for the crop to grow. That is why the same lettuce takes about 50 days in a summer and 90 in an autumn: it needs the same total warmth either way.
For dragon tongue bean, the FAO EcoCrop database gives a lowest growing temperature of 7°C and a shortest growing cycle of 50 days at its best temperature, about 675 growing degree days to a first harvest.
Where you've told us where your garden is, we use this and the weather there to predict when your dragon tongue bean will be ready to harvest. We don't use it for how long a plant lives or when it finishes: we go by what members have logged for that.
Growing dragon tongue beans
- Dig the bed and add compost 1 week before sowing
- Put up supports for climbing beans 1 week after sowing
- Water regularly at sowing every week
- Weed carefully 3 weeks after sowing every 2 weeks
- Pick beans regularly at first harvest every week
- Leave some pods to dry for seed 6 weeks after first harvest
- Pull out finished plants and dig in the roots 8 weeks after first harvest
How members grow dragon tongue beans
Sunniness
Planted from
Photos
Photos
Dragon tongue bean crops
Dragon tongue bean plantings
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Where dragon tongue beans grow
Only plantings by members who have set their locations are shown.
What people are saying about dragon tongue beans
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Who's planted dragon tongue beans
- maco backyard beds · Wheaton-Glenmont, MD
Dragon tongue bean harvests
Nobody has harvested this crop yet.
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Time to harvest
If sown now, expect a first harvest in about 50 to 270 days.
From the growing cycle in the FAO EcoCrop database, which is the same wherever it is grown.
Ecological requirements
Data from the FAO EcoCrop database for Phaseolus vulgaris L.
| Family / Taxonomy | Magnoliopsida Rosidae Fabales Leguminosae |
|---|---|
| Life form | herb |
| Life span | annual |
| Habit | prostrate/procumbent/semi-erect |
| Optimal soil depth | medium (50-150 cm) |
| Optimal soil texture | medium, organic |
| Optimal soil fertility | moderate |
| Optimal soil drainage | well (dry spells) |
| Optimal soil salinity | low (<4 dS/m) |
| Photoperiod | short day (<12 hours), neutral day (12-14 hours) |
Learn more about dragon tongue beans
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