This article presents ethnographic research with in situ seed savers and seed activists in London. Unpicking the knotty relations between kinship, place, and generation among seed savers and their seeds, this article focuses on how the intrinsic and extrinsic get woven through generations and how the situ or environment of an entity is (and is not) recognized in its identity and multispecies kin relations. I argue that thinking about seeds and the worlds in which they grow suggests that they are not only embedded in their environments, but also embody their environments. If seeds bring with them their worlds, then they are inherently malleable, so seed savers are concerned about how commercial seed breeding and ex situ conservation denatures seeds' embodied relationships with their environments and, with that, their inherent intergenerational malleability. [seed saving, multispecies kinship, generation, environment] Seeds are a gift of nature, of past generations and diverse cultures. Thus, it is our inherent duty and responsibility to protect them and to pass them on to future generations. Seeds are the first link in the food chain, and the embodiment of biological and cultural diversity, and the repository of life's future evolution.--The International Commission on the Future of Food and Agriculture, Manifesto on the Future of Seeds