Space dianthus plants every 18 to 24 inches to form an edging in front of flower beds or along a vegetable garden. Dianthus plants that line a flower bed should be chosen to have a flower color that blends well with the other plants that will also be in bloom in spring.
Border walkways by planting dianthus in a line every 2 feet to form a visual barrier next to the walking path. Walkway dianthus should be chosen based on their height and foliage color depending on how much of a barrier you want or if you want to be able to easily step over the plants.
Place dianthus sporadically in rock gardens to add foliage and smooth the visual edges of the rocks. Select the dianthus for the rock garden based on its leaf size and color more than by the flower color.
Add short varieties of dianthus plants to crevices in stone walls. As the low growing plants nestle along the wall, they will add color to the stone without sticking out and disturbing the purpose of the wall to retain a hill, create a division of space or mark a property line.
Plant dianthus every 2 feet next to a concrete curb to soften your property line where it meets the road. As the dianthus grows, the foliage will be able to spill over the curb and mask the hard line between lawn or garden, and concrete.