Abstract: An agronomic test was conducted at the CNRA-Bimbresso research station in order to assess the vegetative behavior of rubber plants on compost-based growing media. To this end, after composting, four compost-based substrates and two soil-based controls were made and tested in a bag nursery. The follow-up of the experiment focused on the evaluation of the vegetative growth parameters and the rates of graftable plants, of grafting success and of transferable plants in the field. The results obtained reveal that the parameters of vegetative growth (diameter at the collar, height of the plants) and the rates of graftable plants and of success in grafting have been improved in rubber plants grown in compost-based substrates compared to control plants. The production of the rubber plant material was optimal with the dose of compost of 300 g or 27 t.ha-1 which, under the conditions of this study, may be the dose recommended on rubber plants in bag nursery.