The Northern Mountainous Region (NMR) of Vietnam is characterised by great physical, social and cultural diversity. It covers a large geographical area, is home to many ethnic minority populations, has an under-developed infrastructure with low levels of urbanisa-tion, and agricultural production plays a highly important role. Since the 1950s, Vi-etnam’s agricultural sector has had several ups and downs due to being significantly in-fluenced by shifting national policies.

Many of the world’s food-insecure and undernourished people are smallholder farmers in developing countries. This is especially true in Africa. There is an urgent need to make smallholder agriculture and food systems more nutrition-sensitive. African farm households are known to consume a sizeable part of what they produce at home. Less is known about how much subsistence agriculture actually contributes to household diets, and how this contribution changes seasonally. We use representative data from rural Ethiopia covering every month of one full year to address this knowledge gap.