[EN] The growth of the energy consumption in our society is not sustainable, fossil fuel reserves are limited and its combustion is largely responsible for the climatic change and the atmospheric pollution in many cities. Then it is necessary the change to a new energetic system based on the efficiency and renewable energy. This work involves the study of the energetic supply of the house by means of the crop of Paulownia, with good properties for its energy use, studying the optimum growth rhythm of Paulownia in two types of soils. An estimate of the feasibility of the proposed crop is presented, along with a soil analysis of the involved fields where the crop is planned, analysing soil properties such as pH, electric conductivity, organic contents and carbonates, texture and colour, as well as the cation exchange capacity and change bases. A discussion of the results obtained is also shown, being favourable to carry out this crop proposal. TFGM