# BBCH-scale (faba bean)

In biology, the BBCH-scale for faba beans describes the phenological development of faba beans using the BBCH-scale.
The phenological growth stages and BBCH-identification keys of faba beans are:
| Growth stage | Code | Description |
| 0: Germination | 00 | Dry seed |
| 0: Germination | 01 | Beginning of seed imbibition |
| 0: Germination | 03 | Seed imbibition complete |
| 0: Germination | 05 | Radicle emerged from seed |
| 0: Germination | 07 | Shoot emerged from seed (plumule apparent) |
| 0: Germination | 08 | Shoot growing towards soil surface |
| 0: Germination | 09 | Emergence: shoot emerges through soil surface |
| 1: Leaf development$^1$ | 10 | Pair of scale leaves visible (may be eaten or lost) |
| 1: Leaf development$^1$ | 11 | First leaf unfolded |
| 1: Leaf development$^1$ | 12 | 2 leaves unfolded |
| 1: Leaf development$^1$ | 13 | 3 leaves unfolded |
| 1: Leaf development$^1$ | 1 . | Stages continuous till ... |
| 1: Leaf development$^1$ | 19 | 9 or more leaves unfolded |
| 2: Formation of side shoots | 20 | No side shoots |
| 2: Formation of side shoots | 21 | Beginning of side shoot development: first side shoot detectable |
| 2: Formation of side shoots | 22 | 2 side shoots detectable |
| 2: Formation of side shoots | 23 | 3 side shoots detectable |
| 2: Formation of side shoots | 2 . | Stages continuous till ... |
| 2: Formation of side shoots | 29 | End of side shoot development: 9 or more side shoots detectable |
| 3: Stem elongation | 30 | Beginning of stem elongation |
| 3: Stem elongation | 31 | One visibly extended internode$^2$ |
| 3: Stem elongation | 32 | 2 visibly extended internodes |
| 3: Stem elongation | 33 | 3 visibly extended internodes |
| 3: Stem elongation | 3 . | Stages continuous till ... |
| 3: Stem elongation | 39 | 9 or more visibly extended internodes |
| 5: Inflorescence emergence | 50 | Flower buds present, still enclosed by leaves |
| 5: Inflorescence emergence | 51 | First flower buds visible outside leaves |
| 5: Inflorescence emergence | 55 | First individual flower buds visible outside leaves but still closed |
| 5: Inflorescence emergence | 59 | First petals visible, many individual flower buds, still closed |
| 6: Flowering | 60 | First flowers open |
| 6: Flowering | 61 | Flowers open on first raceme |
| 6: Flowering | 63 | Flowers open 3 racemes per plant |
| 6: Flowering | 65 | Full flowering: flowers open on 5 racemes per plant |
| 6: Flowering | 67 | Flowering declining |
| 6: Flowering | 69 | End of flowering |
| 7: Development of fruit | 70 | First pods have reached final length (“flat pod”) |
| 7: Development of fruit | 71 | 10% of pods have reached final length |
| 7: Development of fruit | 72 | 20% of pods have reached final length |
| 7: Development of fruit | 73 | 30% of pods have reached final length |
| 7: Development of fruit | 74 | 40% of pods have reached final length |
| 7: Development of fruit | 75 | 50% of pods have reached final length |
| 7: Development of fruit | 76 | 60% of pods have reached final length |
| 7: Development of fruit | 77 | 70% of pods have reached final length |
| 7: Development of fruit | 78 | 80% of pods have reached final length |
| 7: Development of fruit | 79 | Nearly all pods have reached final length |
| 8: Ripening | 80 | Beginning of ripening: seed green, filling pod cavity |
| 8: Ripening | 81 | 10% of pods ripe, seeds dry and hard |
| 8: Ripening | 82 | 20% of pods ripe, seeds dry and hard |
| 8: Ripening | 83 | 30% of pods ripe and dark, seeds dry and hard |
| 8: Ripening | 84 | 40% of pods ripe and dark, seeds dry and hard |
| 8: Ripening | 85 | 50% of pods ripe and dark, seeds dry and hard |
| 8: Ripening | 86 | 60% of pods ripe and dark, seeds dry and hard |
| 8: Ripening | 87 | 70% of pods ripe and dark, seeds dry and hard |
| 8: Ripening | 88 | 80% of pods ripe and dark, seeds dry and hard |
| 8: Ripening | 89 | Fully ripe: nearly all pods dark, seeds dry and hard |
| 9: Senescence | 93 | Stems begin to darken |
| 9: Senescence | 95 | 50% of stems brown or black |
| 9: Senescence | 97 | Plant dead and dry |
| 9: Senescence | 99 | Harvested product |
1 Stem elongation may occur earlier than stage 19; in this case continue with the principal stage 3 2 First internode extends from the scale leaf node to the first true leaf node