Today, biodiversity fairs are held allover Peru and have expanded to include diversity in crops other than potato. Fairs encourage farmers to pay attention to the diversity of varieties they grow. On a more practical level, they provide a space where neighbours can exchange seed and plants, and, at a regional level, they bring farmers from distant communities together, ensuring that seed stocks are rebuilt and expanded. The article shows the example of the biodiversity fair in Colpar, near Huancayo.