The invention aims to provide "cube"-type substrates for growing seedlings, parallelipipedal in form, having their undersurface isolated from the support on which the cubes are placed during the phase when the seedlings are growing on the cube, and being in full contact with the corresponding part of the growing medium during the phase when the seedling is growing on the cube and the growing medium. …??To achieve this double action, there are attached to the undersurface of each cube feet having at least one wire-like part (4) that is buried in the mass of fibres, a stop means (6) along the wire- like part, limiting the latter's penetration into the mass of fibres, and an actual foot part (7), projecting under the undersurface and making it possible to isolate the cube from its support. …IMAGE…
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