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The dianthus plant is also called Sweet William (Dianthus barbatus) and has a fragrance with cinnamon or clove notes. The plants are small and usually between 6 and 18 inches tall.nstructions on how to care for dianthus are very straightforward. Water the plants when dry and apply fertilizer every six to eight weeks. You may also work a slow-release fertilizer into the soil at planting, which will release you from the need to feed the plants.
The dianthus genus contains over three hundred species of perennials, biennials, and annuals. These species are native throughout Europe, Asia, US, and Japan. The dianthus family has more than ten thousand cultivars of different flower forms and uses. The cultivars we offer are perennial selections from Dianthus amurensis, Dianthus deltoides, Dianthus gratianopolitanus, and Dianthus plumarias. These dianthus cultivars either offer unique blooms or a good contrast of foliage to bloom color.