The invention relates to a method and device for administering at least one substance to a plant or plant material, comprising of: (i) providing at least one substrate with a surface and at least one plant location therein; (ii) providing injecting means; (iii) moving the substrate and the injection means relative to each other; (iv) controlling an alignment of the injecting means relative to the plant location; and (v) injecting the substance of the position of the plant location using the injecting means.