The invention relates to a cultivation and sampling method for plants grown in a multi-piece sampling device, said sampling device comprising an upper section (4) with an upper section identifier and a number of cultivation containers (4.1), and a lower section (2) with a lower section identifier and the same number of sample containers (2.1). when the sampling device is in a mounting position, the upper section (4) is connected to the lower section (2) in such a way that the sample containers (2.1) are arranged to correspond to the culture vessels (4.1), that are under them. The method comprises the following steps: In a cultivation phase, the plants are grown in the cultivation vessels (4.1), which are filled with a substrate and / or nutrients, in the upper section (4) of the sampling device； Once the roots of the plants have grown through a base opening provided in each cultivation vessel (4.1) into the sample vessel (2.1) provided below, the root portions in said lower section (2) are removed from the rest of the plants using a cutter (6)； In an analysis phase, the lower section (2) of the sampling device, with the root parts inside, is conducted for an analysis device, a phenotypic description and / or a molecular biological test being performed for the different parts of root, and； In a selection phase, the upper section (4) of the sampling device, with the living rest of the plants within, is led to a selection device and positioned.a invenção se refere a um método de cultivo e amostragem para plantas cultivadas em um dispositivo de amostragem multipeça, dito dispositivo de amostragem compreendendo uma seção superior (4) com um identificador de seção superior e um número de recipientes de cultivo (4.1), e uma seção inferior (2) com um identificador de seção inferior e um mesmo número de recipientes de amostra (2.1). quando o dispositivo de amostragem está em uma posição de montagem, a seção superior (4) é conectada à seção inferior (2) de uma tal maneira que
