This paper reflects on the ecofeminist educational implications of research findings about Australia's Knitting Nannas' Against Gas and Greed (a.k.a. The Nannas') experiences of peer-to-peer, environmental activist learning. Aspects of this unique and successful suite of informal learning practices devised by the Nannas guided by their Nannafesto, and named as Nannagogy, are drawn on to explore the matter of informal ecofeminist education with older women. Drawing on a materialist ecofeminist perspective and learning from older women's activism in overcoming ageist sexism, we argue for the recognition of an emergent learning space we call 'ecofeminist geragogy'. As women age, and the matters of climate disruption and species extinction grow ever more severe, informal learning for transformation (or otherwise) emerges as space rich for research investigation.