Didactic illustration showing the microbouturing of the rose bush which allows from a single piece of rose to obtain more than 40 000 roses per year. The cuttings are a principle of cloning, identical roses. A bud is taken and placed in culture. The microbouture is transplanted every month. We obtain 20,000 to 40,000 cuttings per year that are potted, grown in a greenhouse and finally planted outdoors.