Grow a dianthus perennial by planting it in a sunny location, preparing the soil, giving the plant plenty of space to grow, watering it as needed, composting and mulching the plant each year and pruning the stems. You need a garden fork, a trowel, mulch, compost and pruning scissors.Continue Reading
Select a location in which to plant the dianthus that receives full sun. The soil needs to be well-drained with a neutral pH.
Till the top 12 inches of the soil to loosen it, and work in 2 to 4 inches of compost.
Dig a hole that is twice the size of the container or root ball of the plant that is between 6 and 12 inches away from other plants. Place the plant in the hole, and fill it in with the soil. Gently tamp down the dirt.
Water the plant immediately after planting. Make sure it gets 1 inch of moisture per week.
Add a layer of compost and a 2-inch layer of mulch around the plant.
Deadhead faded flowers. Cut back the plant to within 1 inch of the soil after the first frost.