Until today. Oregano is considered as one of the most interesting medicinal plants. Since the isolated compounds of this plant are used in various industries (pharmaceuticals, agri-food, cosmetics and perfumery), this leads to a great demand for domestication for large-scale cultivation. With this in mind, our study is committed to proposing a strategy for improving the success rate of oregano cuttings under greenhouse conditions. As a working methodology, we proposed the study of the effect of several parameters on the rate of greenhouse cuttings, namely the nature of the substrate, the effect of certain products on the rate of rooting and the effect of the position of the cuttings in relation to the mother plant. With a total of 540 cuttings carried out, we obtained a percentage of success according to the nature of the substrate varying respectively from 32.95%, 34.09% and 32.95% for the sandy substrate, mixture 1/2 sand 1/2 compost and 1/3 sand 1/3 compost 1/3 peat. For the effect of the rooting products, we obtained respectively 22.64%, 20.88%, 26.17%, .29% for willow water, a product based on AIB, a product based on mineral matter and amino acids and a product based on free amino acid and polysaccharides.Our results showed that the cuttings from the apical part, gave the highest rates, and also showed that the success of the cuttings of oregano also depends on the position in the greenhouse.

Index Terms- Greenhouse, Substrate, Apical part, cuttings.