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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.
Dianthus plants, also known as carnations, pinks and sweet Williams, fill gardens with their delightful fragrance. Try growing some of the more unusual types - our range includes green-flowered varieties, as well as the more traditional favourites.