Dianthus should have a full sun position in the garden that has space from other plants as they don't like to be crowded in soil that is well draining.They like rich soil that has two to four inches of well-rotted compost. Work the compost to a depth of 12 inches before planting and reapply a top dressing of compost in spring.They are frost hardy and drought tolerant. Protect your Dianthus from strong winds.