Grodan, supplier of innovative substrate solutions for the greenhouse horticulture sector, has introduced a new stone wool slab for professional Rose-growers: The Grodan Vitaflor. This multi-season slab is the successor to the well-known and widely trusted, WFL - The standard slab used by Rose-growers for many years. Thanks to the Next Generation Substrates® technology applied and the improved fibrous structure, the Grodan Vitaflor delivers all the strengths and advantages offered by the WFL, as well as the benefits of several new features. These range from easy irrigation and rapid drainage, to extra firmness for a long life cycle and a uniform distribution of water, nutrients and oxygen. Rooting has also been visibly improved. This results in a more vital crop with extra vigour.