Abstract: The method for suppressing mold consists of extract from a citrus seed, citrus skin, or other botanical mold suppressant, with the preferable suppressant being made of grapefruit seed extract combined with propylene glycol. The mold suppressant has been formulated to provide for air borne administration, preferably by using a fogging machine, such as a glycol fogger, which may be of the type generally used to apply insecticides, or for special effects in which a “fog” machine is used by entertainers.