What is mixed heirloom in Ethiopian coffee?

Mixed heirloom is the most common varietal designation for Ethiopian green coffee. It means the lot contains a blend of multiple unidentified or unclassified native varieties grown together on the same farm or processed at the same washing station - a catch-all used when the specific varietal composition hasn't been isolated or documented.

Ethiopia has thousands of distinct native coffee populations, many without formal scientific names or commercial identities. Most smallholder farmers grow several varieties alongside each other without distinguishing between them. Processing them collectively produces what gets exported as mixed heirloom.

This isn't something to apologise for. The genetic diversity across a mixed heirloom lot contributes layered, multidimensional flavour profiles that single-variety monoculture struggles to replicate. Mixed heirloom from a well-managed Yirgacheffe station at the right altitude can be exceptional. The trend towards named varieties - Dega, Wolisho, Kurume - is valuable for traceability and commands premiums, but mixed heirloom remains dominant by volume. When it's well grown, well processed, and honestly labelled, it's genuinely good coffee.