To an irrigation tool, etc., to increase the effect of irrigation and save the labor for irrigating a flowerpot or a planter, etc., and to save the labor for preparing a cultivation soil or setting soil in the flowerpot, etc., in use for planting plant.

This irrigation tool uses a water absorptive sheetlike cloth, nonwoven cloth, etc., as a raw material. The irrigation tool is composed of an irrigation tool main body 1 and an absorptive member 2 in one body. The cultivation soil set is formed by wrapping the cultivation soil with a wrapping member. The irrigation system is composed of a water tank 32 and a dropping port 33 made to one body with the water tank 32.