Last edited on November 02, 2026. View history
Black Hulless Barley
A variety of barley
How to sow black hulless barley: Direct seed using 15cm spacing, or broadcast and rake in
Sun requirement for black hulless barley: Plant in Full Sun
A black-seeded hulless barley from Japan, so the grain needs no hulling. It is eaten as a whole grain and also grown as a carbon crop. Because the grain holds phytic acid, it is best fermented, sprouted or soaked before long cooking.
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Black hulless barley 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 black hulless barley, the FAO EcoCrop database gives a lowest growing temperature of 2°C and a shortest growing cycle of 90 days at its best temperature, about 1395 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 black hulless barley 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 black hulless barley
Video
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Ecological requirements
Data from the FAO EcoCrop database for Hordeum vulgare L.
| Family / Taxonomy | Liliopsida Commelinidae Cyperales Gramineae |
|---|---|
| Killing temperature | growth: 0 °C, rest: -4 °C |
| Life form | grass |
| Life span | annual |
| Habit | erect |
| Optimal soil depth | deep (>>150 cm) |
| Optimal soil texture | medium |
| Optimal soil fertility | moderate |
| Optimal soil drainage | well (dry spells) |
| Optimal soil salinity | low (<4 dS/m) |
| Photoperiod | neutral day (12-14 hours), long day (>14 hours) |
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