# BBCH-scale (currants)

In biology, the BBCH-scale for currants describes the phenological development of currants, such as blackcurrants and redcurrants, using the BBCH-scale.
The phenological growth stages and BBCH-identification keys of currants are:
| Growth stage | Code | Description |
| 0: Sprouting/Bud development | 00 | Dormancy: leaf buds and the thicker inflorescence buds closed and covered by dark brown scales |
| 0: Sprouting/Bud development | 01 | Beginning of bud swelling: bud scales elongated |
| 0: Sprouting/Bud development | 03 | End of bud swelling: edges of bud scales light coloured |
| 0: Sprouting/Bud development | 07 | Beginning of bud burst: first green or red leaf tips just visible |
| 0: Sprouting/Bud development | 09 | Leaf tips extended beyond scales |
| 1: Leaf development | 10 | Leaf tips above the bud scales: first leaves separating |
| 1: Leaf development | 11 | First leaves unfolded (others still unfolding) |
| 1: Leaf development | 15 | More leaves unfolded, not yet full size |
| 1: Leaf development | 19 | First leaves fully expanded |
| 3: Shoot development$^1$ | 31 | Beginning of shoot growth: axes of developing shoots visible |
| 3: Shoot development$^1$ | 32 | Shoots about 20% of final length |
| 3: Shoot development$^1$ | 33 | Shoots about 30% of final length |
| 3: Shoot development$^1$ | 3 . | Stages continuous till ... |
| 3: Shoot development$^1$ | 39 | Shoots about 90% of final length |
| 5: Inflorescence emergence | 51 | Inflorescence buds and leaf buds swelling: buds closed, light brown scales visible |
| 5: Inflorescence emergence | 53 | Bud burst: scales separated light green but sections visible |
| 5: Inflorescence emergence | 54 | Green or red leaf tips above bud scales |
| 5: Inflorescence emergence | 55 | First flower buds (compact raceme) visible beside unfolded leaves |
| 5: Inflorescence emergence | 56 | Beginning of raceme elongation |
| 5: Inflorescence emergence | 57 | First flower bud separated on elongating raceme |
| 5: Inflorescence emergence | 59 | Grape stage: all flower buds separated |
| 6: Flowering | 60 | First flowers open |
| 6: Flowering | 61 | Beginning of flowering: about 10% of flowers open |
| 6: Flowering | 65 | Full flowering: at least 50% of flowers open, first petals falling |
| 6: Flowering | 67 | Flowers fading: majority of petals fallen |
| 6: Flowering | 69 | End of flowering: all petals fallen |
| 7: Development of fruit | 71 | Beginning of fruit growth: first fruits visible at raceme base |
| 7: Development of fruit | 72 | 20% of fruits formed |
| 7: Development of fruit | 73 | 30% of fruits formed |
| 7: Development of fruit | 74 | 40% of fruits formed |
| 7: Development of fruit | 75 | 50% of fruits formed |
| 7: Development of fruit | 76 | 60% of fruits formed |
| 7: Development of fruit | 77 | 70% of fruits formed |
| 7: Development of fruit | 78 | 80% of fruits formed |
| 7: Development of fruit | 79 | 90% of fruits formed |
| 8: Maturity of fruit and seed | 81 | Beginning of ripening: change to cultivar-specific fruit color |
| 8: Maturity of fruit and seed | 85 | Advanced ripening: first berries at base of racemes have cultivar-specific color |
| 8: Maturity of fruit and seed | 87 | Fruit ripe for picking: most berries ripe |
| 8: Maturity of fruit and seed | 89 | Berries at base of racemes tending to drop (beginning of fruit abscission) |
| 9: Senescence, beginning of dormancy | 91 | Shoot growth completed; terminal bud developed; foliage still fully green |
| 9: Senescence, beginning of dormancy | 92 | Leaves begin to discolour |
| 9: Senescence, beginning of dormancy | 93 | Beginning of leaf fall |
| 9: Senescence, beginning of dormancy | 95 | 50% of leaves discoloured or fallen |
| 9: Senescence, beginning of dormancy | 97 | All leaves fallen |
| 9: Senescence, beginning of dormancy | 99 | Harvested product |