The BBCH-scale (strawberry) identifies the phenological development stages of strawberry (Fragaria ananassa). It is a plant species specific version of the BBCH-scale.
Phenological growth stages and BBCH-identification keys of strawberryCodeDescriptionPrincipal growth stage 0: Sprouting/Bud development00 Dormancy: Leaves prostrate and partly dead03 Main bud swellingPrincipal growth stage 1: Leaf development10 First leaf emerging11 First leaf unfolded12 2nd leaf unfolded13 3rd leaf unfolded11 . Stages continuous till ...19 9 or more leaves unfoldedPrincipal growth stage 4: Development of stolons and young plants41 Beginning of stolon (runner) formation: stolons visible (about 2 cm long)42 First daughter plant visible43 Beginning of root development in first daughter plant45 First daughter plant with roots (ready for planting)49 Several daughter plants with roots (ready for planting)Principal growth stage 5: Inflorescence emergence55 First set flowers at the bottom of the rosette56 Inflorescence elongating57 First flower buds emerged (still closed)58 Early balloon stage: first flowers with petals forming a hollow ball59 Most flowers with petals forming a hollow ballPrincipal growth stage 6: Flowering60 First flowers open (primary or A-flower)61 Beginning of flowering: about 10% of flowers open65 Full flowering: secondary (B) and tertiary (C) flowers open, first petals falling67 Flowers fading: majority of petals fallenPrincipal growth stage 7: Development of fruit71 Receptacle protruding from sepal whorl73 Seeds clearly visible on receptacle tissuePrincipal growth stage 8: Maturity of fruit81 Beginning of ripening: most fruits white in colour85 First fruits have cultivar-specific colour87 Main harvest: more fruits coloured89 Second harvest: more fruits colouredPrincipal growth stage 9: Senescence, beginning of dormancy91 Beginning of axillary bud formation92 New leaves with smaller lamina and shortened stalk visible93 Old leaves dying, young leaves curling; old leaves of cultivarspecific colour97 Old leaves dead
1 Normally after the three leaf stage the bud development occurs in principal growth stage 5.
References
Meier, U., Bleiholder, H., Buhr, L., Feller, C., Hack, H., Heß, M., ... & Weber, E. (2009). The BBCH system to coding the phenological growth stages of plants–history and publications. Journal für Kulturpflanzen, 61(2), 41–52.
External links A downloadable version of the BBCH Scales