Malysheva & Bulakh, Novosti Sistematiki Nizshikh Rastenii (2014) gives the following habitat information for Auricularia auricula-judae: beech forests in the Teberda Reserve in the western Caucasus, according to two specimens collected in August 2009 and reported in the 2014 study.
In the Netherlands this fungus is common on the branches and trunks of elder, and also on other deciduous trees and shrubs, especially on calcareous soils, from spring to autumn.