Perennial of the Caryophyllaceae family, Dianthus arenarius is native to Northern and Northeastern Europe, from northern Germany and Poland to the Baltic countries, southern Scandinavia, and certain regions of western Russia. True to its name, it is bound to sands: dry sandy lawns, open heaths, edges of continental dunes, and open pine forests on acidic or neutral soil, at low altitude.
It forms supple and dense clumps, 20 to 35 cm in height when in bloom, with narrowly linear, bright green, evergreen foliage. The flowering stems are often subtly tinged with purple at the base. What immediately strikes during flowering is the exceptional delicacy of the flowers: the white petals are cut up to mid-length into narrow, irregular strips, giving each corolla the appearance of a small, almost feathery, laciniated star. The center reveals slightly pinkish stamens, the only hint of color in this complete whiteness. The fragrance is sweet and well-present.
In its natural habitat, its flowering extends from June to August. In cultivation, it generally occurs from June to July, with sometimes a slight resurgence if the stems are cut after the first bloom.
It tolerates acidic soils, unlike the majority of rock garden pinks, and accepts poor sandy substrates, provided the drainage is perfect and the sunlight is total. It is one of the rare species of the genus adapted to gardens on non-calcareous soil.