NOVELTY - Nursery stock soft bag for roof greening, comprises nursery stock, soft bag, culture substrate, and culture medium which is placed in the soft bag, where the culture substrate comprises a lower layer substrate which is positioned at the bottom of a cloth bag, and an upper layer nutrient substrate which is placed on the lower layer substrate, and the nursery stocks are planted in the upper layer nutrient substrate which is filled in the cloth bag.    USE - The nursery stock soft bag for roof greening is useful for cultivating drought resistance arborescent shrub (claimed).    ADVANTAGE - The nursery stock soft bag can prevent nutrient soil from running off and environmental pollution when used for greening a roof, can prevent the propagation of weeds and germ contamination, and can be appropriately changed according to the greening space, hence various forms of roof greening landscapes are created.    DETAILED DESCRIPTION - Nursery stock soft bag for roof greening, comprises nursery stock, soft bag, culture substrate, and culture medium which is placed in the soft bag, where the culture substrate comprises a lower layer substrate which is positioned at the bottom of a cloth bag, and an upper layer nutrient substrate which is placed on the lower layer substrate, and the nursery stocks are planted in the upper layer nutrient substrate which is filled in the cloth bag. The soft bag has opening (3-5 cm) at one end and is sealed at other end. The soft bag is made of nonwoven fabric. The thickness of the soft bag is 0.5-1.5 cm, and the density is 15-50 pixels per inch (PPI). The thickness of the lower layer substrate is 1 cm. The lower layer comprises garden soil and perlite in the volume ratio of 1-2:1-2, where 1/3-1/5 of the lower layer is filled with the culture medium. The thickness of the upper layer substrate is 1 cm. The upper layer comprises soil, compost, perlite and grass peat in the volume ratio of 3.5-4.5:1.5-2.5:1.5-2.5:0.5-1.5. An INDEPENDENT CLAIM is included for preparation method of the nursery stock soft bag, which involves manufacturing the soft bag, filling the bottom layer substrate, filling the upper layer nutrient substrate, planting the nursery stocks, covering sponge, and sewing the bag.