PURPOSE: To increase a handling and preserving features, by forming a watertight foldable bottom at one side of a water-proof flower vase keeping a self- standing multi-angular cylindrical posture when it is used and further, by arranging a seedling rearing material including plant seeds inside the vase, although it is kept flat when it is not used.

CONSTITUTION: Folding lines 2 in parallel with a water proof flat belt cardboard 1 are provided every constant distance and the both ends are jointed to form an erected flower vase A opened at the hexagonal upper end in a plan. A bottom plate 4 with the length enough to support the right hexagon is provided to be a bridge between the lower edges of the opposite side plates 3 and the upper edge of a tensile piece 6 is jointed to the outer side of the bottom plate 4. A folding bag 7 made of synthetic resin materials, having a structure with a bottom opened upward, is placed on the bottom plate 4 inside the flower vase A. And a seedling-rearing material 9 mae of a cloth holding plant seeds 8 on the top and hanging to the bottom of the bag 7 at the both foot 9a is contained in te middle part in inside of the bag 7. In this construction it is easy to put away, keep and transport it and also increases an advertising effect.