Since the exact definition of the school garden has not been determined, it can be said that a school garden is a part of the school space to which all garden technical elements and all plant species are a part of, where students, with their teachers, participate in the planting, processing or arrangement of given plants. The purpose of this research is to investigate the educational role of school gardens in classroom teaching by qualitative research methods. Methods used in this research were interview methods, analysis of documentation, collection of photographs and development of a school garden plan. By researching the historical and contemporary overview of school gardens and the diversity of school gardens in Osijek-Baranja County, by interviewing Marija Fuderer, head of the Fuderer ornamental plant nursery in Valpovo, about suitable plant species to plant in the school garden, by presenting the project "The most beautiful school gardens in Croatia" as the source of motivation of teachers and students and by designing two school gardens, it was revealed that the maintenance of the school garden can improve the environmental awareness of students, that school gardens play an extremely important role in terms of acquiring knowledge about flora, gardening and nature protection. By participating in the work of school gardens, students have the opportunity to observe and gain knowledge about plant species on a living example; in the school garden they can perform practical work, acquire work habits, socialize and play with other students, develop love for nature and learn about the importance of organic farming of fruits and vegetables. The educational contents of the school garden help students to develop the ability to critically observe, understand the dependence of nature and people, develop responsibility, discipline and teamwork. The organization of the garden is indeed extremely important for the upbringing and education of students, but in realization of the benefits of working in the school garden, you need a brave, enthusiastic and creative teacher who will provide these values of school garden management to his students and these values are indispensable in today's world of environmentally unacceptable breeding and the dominance of modern technology.