Waste management in urban areas is a complex process, encompassing a variety of activities (e.g., acquiring, sorting, disposing),actors (e.g., single individuals, waste collectors, condominium associations), and capacities (e.g., from household recycling stationsto physical infrastructures such as recycling and sorting facilities).Whereas previous HCI design research has tackled problems withwaste management from an individual, behavioral change perspective, we approach this design space through a feminist ecologicaldesign perspective of Digital Environmental Stewardship. Througha combination of qualitative empirical data and materials generated at design workshops, we outline challenges related to wastemanagement in a complex of five multi-apartment buildings. Wepropose a number of design explorations addressing such challenges, and reflect on the generative role of the DES framework inframing design from a collective and ecological perspective.