Ecological gardens are earthy, colorful creations where people and biological elements coexist. Food production in the garden is an intensive interaction between people, soil, flora and fauna. Through ecological gardening, even though it is a small part of the ecosystem, we can influence the ecological crisis and introduce significant changes. Gardens are a shelter for plant and animal life, they can influence the balance of water circulation in nature, lead towards cleaner and more responsible future and preserve biodiversity. The purpose of this research was to investigate the role of ecological gardens for preschool children with the application of the 7R model of upbringing and education for sustainable development and to promote the importance of kindergartens with ecological gardens. Methods used in this research were interview, the analysis of relevant literature and the collection of photographs. By reviewing the theoretical basis of ecological gardens, researching the role of ecological gardens in early and preschool education, describing gardening activities suitable for preschool children, giving tips and recommendations for more successful maintenance and management of an ecological garden in kindergarten, conducting interviews and presenting valuable ecological gardens of four kindergartens in the Republic of Croatia, it is discovered that ecological gardens play an extremely important role in terms of developing social skills, principles of savings, healthy eating, basic life skills, empathy and sensitivity for nature and the environment in children of early and preschool age, that they can be an excellent source of motivation, promote, establish and strengthen simple cause-and-effect relationships and develop children's artistic expression, children learn about work activities and cooperate with peers, children's practical experiences are enriched, sensory elements are included to create a stimulating educational environment as well as the adoption of the basic components of sustainability. It has been established that with a lot of effort, courage, will and cooperation, children can be provided with an inexhaustible source of knowledge and life-practical experiences in the form of an ecological garden, which will not only have exceptional benefits for the upbringing and education of children of early and preschool age, but will also have a positive impact on the natural ecosystem as a whole.