The ecological crisis and growing waste problems require Islamic educational institutions to function not only as spaces for transmitting religious knowledge but also as arenas for developing ecological awareness and practices. This study examines green pesantren as a manifestation of Islamic ecotheology through waste management practices at Lirboyo Islamic Boarding School in Kediri. It focuses on how the Islamic values of khalīfah fī al-arḍ, amanah, cleanliness, and environmental responsibility are translated into everyday pesantren life. This study employs a qualitative field approach, with data collected through in-depth interviews, participant observation, and documentary analysis. Data were analyzed descriptively through data reduction, data display, and conclusion drawing, supported by source and method triangulation. The findings indicate that environmental management at Lirboyo has developed through a Plastic Waste Processing Unit established in 2018 and the establishment of the Maggot Waste Management House in 2025. These practices not only contribute to waste reduction but also develop students’ practical skills, connect the pesantren with the surrounding community, and generate economic value. Waste management therefore constitutes an arena where religious values, infrastructure, technology, embodied practices, communal habituation, and economic mechanisms intersect. From the perspective of embodied Islamic knowledge, Islamic ecological values acquire practical form through repeated bodily actions and everyday routines, although their internalization remains uneven and requires continuous education and habituation. This study argues that green pesantren should be understood not merely as an institutional environmental program but as an ongoing process of ecological habitus formation that connects Islamic theology, education, institutional culture, material practices, and economic self-reliance.
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