Abstract: A method for colouring a flower on a pot plant comprises the steps of (i) providing a pipette (8), (ii) arranging in the stem of the flower a bore with a diameter corresponding to the diameter of the outer end of the pipette, (iii) inserting the outer end of the pipette into the bore and fixing the pipette relative to the stem, (iv) filling the pipette with a quantity of colouring liquid, which is non-toxic to the pot plant, following any of the steps (i), (ii) or (iii) as desired, and (v) removing the pipette after the quantity of colouring liquid has been taken up by the pot plant, and pot plant with at least one flower which is coloured with a colouring liquid introduced via the stem of this flower.