The present invention relates to a nutrient for promoting growth of crops and a crop cultivating method using the nutrient, and more specifically, to a nutrient for promoting growth of crops, the nutrient which can increase productivity of farms by promoting the growth of crops such as fruits, vegetables or the like and enhancing disease resistance of the crops; and a crop cultivating method using the nutrient. The nutrient of the present invention is prepared by mixing 5 to 25 parts by weight of seawater, 1 to 5 parts by weight of loess water, 0.5 to 2 parts by weight of kelp powder, 0.1 to 0.5 part by weight of sulfur, and 2 to 10 parts by weight of a pine root extract with respect to 100 parts by weight of fresh water, the loess water is obtained by stirring 10 to 30 parts by weight of loess powder milled to a particle size corresponding to a sieve size of 200 to 300 meshes with respect to 100 parts by weight of water, and the pine root extract is obtained by adding any one extraction solvent selected from water and alcohol to a pine root, thereby extracting an extract of the pine root at 80 to 120°C for 6 to 10 hours.본 발명은 작물 생육 촉진용 영양제 및 이를 이용한 작물재배방법에 관한 것으로서, 더욱 상세하게는 과수나 채소 등과 같은 작물의 생육을 촉진시키고 내병성을 강화시켜 농가의 생산성을 증대시킬 수 있는 작물 생육 촉진용 영양제 및 이를 이용한 작물재배방법에 관한 것이다. 본 발명의 작물 생육 촉진용 영양제는 담수 100중량부에 대하여 해수 5 내지 25중량부와, 황토수 1 내지 5중량부와, 다시마 분말 0.5 내지 2중량부와, 유황 0.1 내지 0.5중량부와, 송근 추출물 2 내지 10중량부를 혼합하여 조성되고, 황토수는 물 100중량부에 대하여 200 내지 300메쉬 입도 크기로 분쇄한 황토 분말 10 내지 30중량부를 교반하여 수득하고, 송근 추출물은 물과 알코올 중에서 선택된 어느 하나의 추출용매를 소나무 뿌리에 가해 80 내지 120℃에서 6 내지 10시간 동안 추출하여 수득한다.