Abstract: The element is intended to be placed in a receptacle for the cultivation of at least one plant, and includes: a substantially solid body including a substrate adapted to enable said plant to develop; at least one seed of said plant disposed on the body in at least one seed receiving area; a layer for holding the seed(s) in said receiving area, comprising a dried mineral powder. The holding layer results from drying a deposition of a holding composition including a mineral powder suspended in water.

Abstract: The invention concerns a plant cultivation device. The device comprises a receptacle having at least one peripheral wall and a bottom wall. The bottom wall has at least one hole opening into an irrigation tube, a region of the bottom wall around the, or each, hole comprising guide means adapted to guide roots of a plant around the corresponding hole to keep the irrigation tube substantially clear. The invention also concerns a cartridge comprising a substrate, adapted to be positioned in this receptacle, the cartridge having a lower face comprising at least one relief adapted to cooperate with the guide means of the receptacle.