[8] Within the genus Harzia, H. acremonioides is one of the most common species that can be found in all climate regions around the world.

[7][13] The genus name of Eidamia was in honour of Michael Emil Eduard Eidam (1845 - 1901), a German apothacary and botanist (mycology) from Breslau.

It has been reported from peat bogs in Ireland soil in the Netherlands, Germany, Canada, the United States, the British Isles, Australia, Papua, Mozambique, Sierra Leone, Rhodesia and Kenya, carst caves in the USSR and Yugoslavia, coniferous forests in Japan and Hungary, whereas the main recorded substrates are the seeds of different plants that are often found in association with Alternaria alternata.

[8] The species has been isolated from seeds from the Netherlands, Denmark, British Columbia, and Ontario.,[9] and a variety of seeds that associated with the species includes Allium cepa L. (onion), Beta vulgaris L. (beet), Daucus carota L. var.

(carrot), clover, peas, wheat, grass, cotton, radish, timothy and sorghum.

[8][9] It has also been isolated from rotting stems and leaves of clover, radish, Betula alba, tomato, beans, corn, Salsola kali, graminaceous plants.