Examining the graveside tributes left at Brooklyn’s Green-Wood Cemetery, this article considers the meaning-making work of decay. Green-Wood is a polysemous place, existing as a historical and active cemetery, an arboretum, an arts and performance space, a space of mourning, and a place of leisurely strolling and birdwatching. Through a site-specific analysis of the cemetery, I approach decay as an active and durational phase of material life and explore different decay-temporalities through the tributes left graveside. I argue that orienting ourselves to the decay-life of things necessarily entangles us in a larger ecological ethic and relational ontology of self, land, weather, animals (human and non-human), and time. While advocating for material attention to decay-life, I consider how the aesthetics and taboos of decay shape the cemetery’s relationship to visible and invisible rot and ruin. The cemetery staff, wildlife, visitors, ecology, climate, and the dead create a complex network of active actors experiencing and altering the material decay-life of the left-behind natural and artificial material tributes. Together, this active and entangled decay-life of the site forms a network of temporalities of decay that co-construct the affective and environmental space of the cemetery.