The disclosure relates to a powder composition or a slurry composition which comprises a collection of particles (I) having median particle diameter of 10 micrometers to 200 micrometers, wherein each of said particles (I) comprises:(a) a covering of a fatty compound which contains a fatty group having at least one chain of carbon atoms that is at least 8 carbon atoms long, wherein the fatty compound has a melting point of 50 Deg. C to 110 Deg. C and (b) one or more inner particles (II) contained within particles (I), wherein particles (II) comprise one or more complex that contains a cyclopropene compound molecule or a portion of a cyclopropene compound molecule encapsulated in a molecule of a molecular encapsulating agent, wherein the molecule of molecular encapsulating agent comprises alpha-cyclodextrin, beta-cyclodextrin, or gamma-cyclodextrin. The powder composition of may be used for treating plants or plant parts in any way, such as, the powder composition may be mixed with other materials or may be used directly. The preferred method of using the powder composition of the present invention is to use it to form an aqueous slurry which can be formed by mixing the powder composition with an aqueous medium. .
