Wait until the flower blossoms wilt and fall off the central orchid stalk and then wait until the stalk turns yellow or brown. The time for this to occur varies based on species.
Hold back the lower foliage of the orchid with one hand and trace the dead central stalk back to where it emerges from the center of the orchid plant.
Measure up approximately 1 inch from the base of the stem and cut the stalk off using pruning shears or a scalpel, making the cut straight across the top. Do not prune lower than 1 inch above the base or you may injure the other foliage or the base of the orchid plant.
Sprinkle 1/2 tsp. of ground cinnamon in your hand and cover the cut end of the orchid stem with the cinnamon, which acts as a natural fungicide to prevent infection.