Flocking a real Christmas tree involves the application of a special white powder to the tree, creating a soft, fluffy texture and giving the tree a snow-covered appearance. Flocking can be done by purchasing a flocking kit, which typically includes a flocking machine, flocking powder, and applicator. To flock a tree, the machine is used to spray the powder onto the tree, covering it in a thin layer of powder. The powder is then gently brushed into the tree's branches, creating a fluffy texture.