A grow plug (1) has a dimensionally stabilized dried body (3) of glued organic material as well as at least a single seed grain (5). The seed grain is present on the body and the body has a density that is such that it absorbs liquid from below up to the top side and retains an amount of water that is sufficient for having the seed grain germinate and grow into a plant. When a plant is cultivated by means of this grow plug (1) the grow plug is put in the soil (25) or in a cultivation system and subsequently moistened by pouring water from above onto the grow plug, where the redundant water is drained by the grow plug or the grow plug is inserted into water (21) with its bottom side, and the grow plug sucks up water and some time after the germination of the seed grain the grow plug is put in the soil (25) or in the cultivation system.
