These days, garden roses come in an extensive variety of forms and colors, including pure blue and black. The blossoms can be single or clustered into different formations. According to their intended use, a suitable rose can be found for your garden. Growers distinguish between tea roses (tea hybrids), bedding roses (polyantha roses), ground-covering roses, and climbing or rambling roses. Today there are more than 30,000 known rose varieties … and, every year, new are added. Growers endeavor to develop new colors, fragrances, and forms, but there are also ongoing attempts to improve flower health and resistance to typical diseases such as mildew.