PROBLEM TO BE SOLVED: To provide a culture medium for a plant in which a solid phase rate, liquid phase rate and gas phase rate can be regulated in a wide range.SOLUTION: There is provided a plant culture medium in which the medium is configured to be made with mineral fiber and the mineral fiber has an untamped density of 0.05 to 0.13 g/cm3.COPYRIGHT: (C)2014,JPO&INPIT【課題】固相率、液相率、気相率の広い範囲に亘る調整が容易な植物用培地を提供することである。【解決手段】植物用培地であって、前記培地は鉱物繊維が用いられて構成されてなり、前記鉱物繊維は、その軽装嵩密度が0.05~0.13g/cm3である。【選択図】図8