BBCH-SCALE (BEAN)

The 'BBCH-scale (bean)' identifies the phenological development stages of the bean plant. It is a plant species version of the BBCH-scale.
A downloadable version [1] of the BBCH Scales, including illustrations, is available from the BBA [2] (Federal Biological Research Centre for Agriculture and Forestry)

'Phenological growth stages and BBCH-identification keys of bean'
'Code'	'Description'
Principal growth stage 0: Germination
00	Dry seed
01	Beginning of seed imbibition
03	Seed imbibition complete
05	Radicle emerged from seed
07	Hypocotyl with cotyledons breaking through seed coat
08	Hypocotyl reaches the soil surface; hypocotyl arch visible
09	Emergence: hypocotyl with cotyledons break through soil surface (“cracking stage”)
Principal growth stage 1: Leaf development
10	Cotyledons completely unfolded
12	2 full leaves (first leaf pair unfolded)
13	3rd true leaf (first trifoliate leaf) unfolded
1 .	Stages continuous till . . .
19	9 or more leaves (2 full leaves, 7 or more trifoliate) unfolded
Principal growth stage 2: Formation of side shoots
21	First side shoot visible
22	2nd side shoot visible
23	3rd side shoot visible
2 .	Stages continuous till . . .
29	9 or more side shoots visible
Principal growth stage 5: Inflorescence emergence
51	First flower buds visible
55	First flower buds enlarged
59	First petals visible, flowers still closed
Principal growth stage 6: Flowering
60	First flowers open (sporadically within the population)
61	Beginning of flowering: 10% of flowers open1 Beginning of flowering2
62	20% of flowers open1
63	30% of flowers open1
64	40% of flowers open1
65	Full flowering: 50% of flowers open1 Main flowering period2
67	Flowering finishing: majority of petals fallen or dry1
69	End of flowering: first pods visible1
Principal growth stage 7: Development of fruit
71	10% of pods have reached typical length1Beginning of pot development2
72	20% of pods have reached typical length1
73	30% of pods have reached typical length1
74	40% of pods have reached typical length1
75	50% of pods have reached typical length,beans beginning to fill out1Main pod development period2
76	60% of pods have reached typical length1
77	70% of pods have reached typical length, pods still break cleanly1
78	80% of pods have reached typical length1
79	Pods: individual beans easily visible1
Principal growth stage 8: Ripening of fruit and seed
81	10% of pods ripe (beans hard)1 Seeds beginning to mature2
82	20% of pods ripe (beans hard)1
83	30% of pods ripe (beans hard)1
84	40% of pods ripe (beans hard)1
85	50% of pods ripe (beans hard)1 Main period of ripening2
86	60% of pods ripe (beans hard)1
87	70% of pods ripe (beans hard)1
88	80% of pods ripe (beans hard)1
89	Fully ripe: pods ripe (beans hard)1
Principal growth stage 9: Senescence
97	Plants dead
99	Harvested product

1 For varieties with limited flowering period

2 For varieties in which the flowering period is not limited

Contents

References

References

Phänologische Entwicklungsstadien von Gemüsepflanzen: II. Fruchtgemüse und Hülsenfrüchte. Nachrichtenbl. Deut., , C., Feller, Pflanzenschutzd.,