Improving biodiversity in Central and Eastern European domestic gardens needs regionally scaled strategies

Amid ongoing urbanisation and increasing anthropogenic activities, domestic gardens, while cannot replace natural habitats, play a crucial role in enhancing urban biodiversity by supporting green areas and as parts of ecological corridors. Moreover, these biodiversity-friendly gardens also improve human well-being and foster a connection between nature and people. We circulated an online questionnaire between 2022 and 2023 to investigate how the garden parameters, the gardening motivation of garden owners, and their pesticide use habits depend on each other in nine Central– and Eastern European (CEE) countries. Moreover, we aimed to explore the differences and similarities between gardens and gardening practices with a potential for maintaining high biodiversity. To achieve this, we assessed the ecological value of the gardens, the motivation of garden owners, and their pesticide use habits using an answer-based scoring system. Our findings reveal significant variability both among participating countries and within them on a smaller and larger scale, across all three indices, highlighting the need for region-specific circumstances rather than unified regulations across European countries to maximize the conservation value examined. Our study underscores the potential of domestic gardens in designing eco-networks and informs strategies to optimize their environmental benefits. However, due to the ubiquitous domestic use of pesticides in CEE, informing garden owners about the environmental and human health effects of pesticides would be equally necessary in every area, both urban and rural. Additionally, our findings suggest that effective environmental educational programs and tailored strategies should be developed to meet local needs rather than overarching but too general international targets. At the same time, these programs should provide comprehensive biodiversity-related information, reaching all strata of society. This is especially important in CEE, where such initiatives are currently under-emphasized.