Perennial of the Campanulaceae family, Campanula trogerae is endemic to Turkey, where it colonizes the crevices of cliffs and vertical or overhanging limestone rocks, at medium to high altitudes in Anatolia.
It forms low, spreading clumps, with densely tomentose leaves, a very marked silvery-white, allowing it to tolerate the aridity and intense sunlight of its rocky habitat. The flowering stems, flexible and slightly drooping, bear strong pink-lilac buds before anthesis, which open into large, very starry corollas, pure white to slightly bluish white, with golden yellow stamens at the center.
This contrast between the pink buds and the open white flowers is one of the most immediately striking features of the species.
In its natural environment, its flowering extends from June to August. In cultivation, it generally occurs from May to July.
It requires absolute drainage, a very mineral and limestone substrate, a sunny exposure, and protection against stagnant winter moisture. Cultivation in a dry wall crevice or alpine trough suits it perfectly.