Rosemary is one of the medicinal plants traditionally used in allopathy and is also considered to have condimental and/or alimentary uses, found in Mediterranean cuisine; It is also a melliferous plant. As the demand for a continuous and uniform supply of aromatic and medicinal plants increase, the demand for a wide variety of wild species is increasing with the needs growth and the trade globalization. In order to meet the market, our study proposes a strategy for improving the rosemary success rate cuttings in greenhouses. This work objective is to study the effect of three types of substrate, as well as the effect of certain products on rosemary rooting and stem elongation in the greenhouse. To do so, we conducted an experimental protocol consisting in a total of 540 cuttings of Rosemary, grown in three types of substrates (180 cuttings for each substrate), in a greenhouse at Kenitra Faculty of Science. The cuttings are planted in plastic bags filled with three types of substrates (Substrate 1: sandy soil; Substrate 2: ½ of substrate 1 + ½ of compost and Substrate 3: 1/3 of substrate 1 + 1/3 of compost + 1/3 of peat) and placed in the greenhouse). Once prepared, the cuttings underwent a chemical treatment consisting of soaking the cuttings for 10s in 4 rooting products (willow water (ES), a 3-indolbutyric acid-based product (P1), a product based on mineral matter and amino acids (P2) and a product based on free amino acid and polysaccharides (P3)), a control was left without undergoing any treatment. The cuttings success percentage and the rosemary length stems were the main studied parameters. The obtained results showing the substrate effect on the success rate of cuttings are 44.73, 27.79 and 27.47 respectively for substrates 3, 2 and 1. Indeed, the statistical analysis revealed a significant difference between the average stem size and the average survival rate for the cuttings in substrate 3 compared to those of substrates 1 and 2.No significance was observed concerning the rooting products effect on the rosemary cuttings rate compared to the control.

Index Terms: Cutting, Greenhouse, rate, Substrate, Survival, Rosemary.