Highly successful afforestation applications and good performance development is linked to adoption of correct afforestation techniques, quality of seedling material, selection of appropriate origin, seed material, and treatment of seedlings. One of these treatment processes is subjecting seeds to a magnetic field. The aim of this study is to determine the effects of magnetic field on the germination of seeds and growth of seedlings of stone pine (Pinus pinea L.). For this purpose, seeds (Aydin-Kocarli origin) were used in nursery garden beds (Isparta, Turkey) with three replications based on completely randomized design. A magnetron tube setup was used to generate a magnetic field. A 220V AC magnetron tube was positioned 15 cm above the seed container, and 280, 336, 462, and 595 W output for 15, 30, and 60 s was applied, respectively. As a result of being subjected to the magnetic field, stone pine seeds experienced changes in seedling morphological characteristics and positive effects on seedling growth and development. It is believed that application of 280 W microwave of 160 micro Tesla intensity for 60 s could suppress live plants by encouraging quick seedling development, help seedlings benefit from water and nutrient elements in the earth, and contribute to the economy of the country by reducing development time.