Localised processing of waste into resources is a prime target towards circular economy, yet community-led composting programs have reported significant implementation challenges. There are no implementation process models or guidelines for programs spanning community, waste, governance, legislation domains: each community learns anew. Here we report a multi-case study of community-led composting program implementations in eight urban sites in China. In-depth key-informant interview information was analysed as cycles of activity towards increasingly-complex needs/targets (like simple recycling; complex composting). Cross-community comparisons suggest transferable implementation lessons: delegation of certain roles is more effective than simply involving stakeholders; enthusiasts can significantly mobilize stakeholders but cannot replace them; paperwork burden could negate funding availability benefits; access to specific expertise (technical, legal, operational) at crucial moments was key; stakeholder learning was most effective via personal meetings and introductions. City policies incorporating these implementation lessons could facilitate scaling-up in China. Future studies can investigate generalizability.