Udaini
The most frequently cited of the Yemeni vernacular names. It denotes a type of plant recognised by growers, not a registered variety.
Frequently asked questions
Is Udaini an heirloom variety?
Yes: it is a native, unselected variety. Heirlooms do not come from a breeding programme and their classification often remains approximate.
How it grows
In Yemen, plant names are vernacular. Montagnon's study (Agronomy, 2022) surveyed the names on 148 farms across the main coffee areas and genotyped 88 trees whose name had been confirmed by the growers: the names follow a clear geographical pattern but show no significant association with genetics. There are three genetic groups — SL34-derived, Bourbon/Typica-derived, and the "New-Yemen" group, which resembles no variety grown anywhere else.
Where it is grown
Sources
Altitude, cup profile and scores describe the typical behaviour of the variety: a single lot depends on the harvest year, soil, processing and roast. Data without a verified source is not published.