To make the rhizome of a plant sound, to provide a plant with antimicrobial properties and consequently to increase a yield.

This method for providing a plant of raising of seedling with activity is characterized in that Trichoderma harzianum SK-5-5 granule in an amount of 10 g to 100 g per m2 and 107 to 108 conidiospores or 105 to 106 chlamydospores in 1 g is sprayed on a seedling raising bed, mixed with the soil in the vicinity of surface layer, provided with a proper amount of water to adjust a filamentous fungus proliferation condition and then seeds are sowed.