Metsumi is a traditional Japanese technique of applying a thin layer of wax or resin to the buds of certain trees, such as cherry, plum, or maple. The purpose of metsumi is to protect the buds from frost damage, pests, and diseases, and to enhance their appearance and fragrance. Metsumi is usually done in late winter or early spring, before the buds start to swell and open. The wax or resin is melted and applied with a brush or a cloth, covering the entire bud. Metsumi can also be used to shape the buds into desired forms, such as round, oval, or pointed. Metsumi is considered an art form that requires skill and patience, and it is often practiced by bonsai enthusiasts and gardeners who appreciate the beauty and symbolism of flowering trees.