To simplify the covering of construction method of greening never disturbing germination and growth of plants by using a nonwoven fabric formed of a synthetic resin fiber having a specified size in which the metsuke weight is set to a specified value, and extending it over a material sprayed onto an inclined ground such as slope.

This spraying curing material is formed of a nonwoven fabric sheet matter having a number of mesh openings of an unspecified shape formed thereon, which is formed of a synthetic fiber of 3-20 deniers such as polyester or polypropylene. The metsuke is set to 10-20g/m2, and the thickness to 0.5-2mm. A low melting point fiber is preferably mixed with raw cotton followed by thermal treatment to bond the fibers over the whole nonwoven fabric sheet matter. The spraying curing material is extended on a sprayed material laid in wet state after construction with rolling to cover the sprayed material, and adhered and bonded. Thus, the sagging of the non-dried sprayed material or the loss by rain is prevented so as not to arrest the germination and growth of plant. Thus, the man-hour for greening of a slope can be reduced to save the labor.