Beautiful and useful object, the grids are simply assembled together. A planting plan is included in the kit, which imitates different climate zones to create perfect growth conditions for the plants. The three-dimensional spiral shape and the heat-retaining ability of the stones create four zones: from water to humid, normal, and Mediterranean climates. It should be oriented north-south to take full advantage of sunlight. The water zone can be created by establishing a mini pond at the bottom. Recommended stone grain size: approximately 25-60 mm. Includes separation foil and wooden posts. Stones, soil, stream, and planting are not included in the delivery.