The BBCH-scale (potato) identifies the phenological development stages of a potato (Solanum tuberosum).
It is a plant species-specific version of the BBCH-scale.
From seed: cotyledons completely unfolded 9 leaves of main stem unfolded (> 4 cm) (3 digit) 1 For second generation sprouts 2 Stem development stops after termination of main stem by an inflorescence.
Branches arise from axils of upper leaves of the main stem, exhibiting a sympodial branching pattern