Habitat and Ecology
Geastrum minimum is a saprobic species, growing in well-developed and old Greek juniper forest on Golem Grad Island, where these trees constitute the association Pruno webbii-Juniperetum excelsae. The species is most probably extinct from this site because it was spotted only once, in 1997, and it has not been reconfirmed since then, notwithstanding the numerous visits to Golem Grad almost on an annual basis. This species has also been sighted along the Pcinja river, in oak – hornbeam forest, bordering a well-developed Grecian juniper association. It has also been found in pine-oak and mixed forest, wherefore the tiny earthstar is predicted to also occur on other localities with Grecian juniper and / or oak.