To manufacture an artificial stone and an artificial tree resembling a natural stone and a natural tree using a simple means with a lightweight and low-priced synthetic resin foamed material and at the same time, easily fabricate the foamed material into a planting pot like a planter.

A planter base body 2 which is made of a foamed styrol material and is close to a desired outer shape, is formed with recessed parts 3a, 3b, 3c for planting a flowering plant formed at three spots. In addition, drains 8a, 8b are provided from the upper stage recessed part 3a down to the lower stage recessed parts 3b, 3c and the planter is finished in detail to the shape close to a natural stone or a natural tree by thermally melting the outer surface of the planter base body 2 and the inner surfaces of the recessed parts 3a, 3b, 3c. Further, the whole surface of the planter is plastered with a cement material containing an adhesive and then a coating adjusted to the color tone of a stone or a tree suitability is applied to the surface of the cement material to obtain the completed planter P.