Carnation needs sun
Because of their origin, carnations prefer a location in full sun, although this can also be drafty and windy. A sunny spot with well-drained soil is the best prevention against rot. Due to the generally very good vitality of the plants, one is often tempted to establish them in partial or full shade. But then there is a risk that fungal diseases will set in and / or the plants will turn yellow from the center. Strong winter wetness should also be avoided if possible. Basically, any soil is suitable for carnations, provided that it has been loosened well with sand if necessary.
Excellent companion plants are other cushion plants from the rock garden, such as bluebells (Campanula), carnations (Dianthus) or thyme (Thymus).