PROBLEM TO BE SOLVED: To provide a method for growing plants that has excellent safety because it uses no herbicide, and can suppress the germination of weed seeds, and also has excellent economical efficiency.SOLUTION: A mulch sheet 4 is laid from the top 2 of a ridge 1 to both sides 3. After that, between the ridges 1 with the soil exposed, chaff or chaff smoked charcoal 5 is laid between the sides 3 of the ridge 1 across the mulch sheet 4. A plant 7 is put in an opening 6 formed in the mulch sheet 4.SELECTED DRAWING: Figure 1