An arrangement in boxes holding cellular compartments intended to nurse preferably forest tree seedlings until they are ready to be transplanted, The cellular compartment walls consist of paper, pasteboard or similar material coated on one side with plastics. To make it practically possible to break up the individual cellular compartments to separate the seedlings grown therein, each row of cellular compartments on the transverse or lengthwise direction of the box is provided on both sides with a strip adhering to the sides of the row of cellular compartments, Said strips form separately continuous lengths from row to row of cellular compartments. To break up each individual cellular compartment in a row to separate the seedlings the strips are pulled out and apart. Fig. 1
