All Dianthus need to be planted in a place in the garden that gets at least 6 hours of sunlight a day. They will not tolerate being wet all the time so need dry, free draining soil, making rockeries and the front of borders the ideal spot for them. That being said, like all plants you must water them regularly to get them established. Remove tired looking flowers and stems straightaway to keep plants blooming. Plants need good air circulation around them, so do not overcrowd them wherever you plant them.