Carnations will grow from 2″ to 3 feet high, most garden varieties grow 10 to 20 inches tall. The plants have grayish-green foliage and fragrant, semi-double rosy, purple or white flowers. There are many hybrid varieties in a variety of colors and sizes with no fragrance. They bloom mainly during cool times of the year, especially early winter. They are great plants to grow in gardens and can be used as cut-flowers. If properly treated, carnations will last up to a month.