The paper presents the research results in one hundred ecological farms which hold a certificate, located in Southern Poland. The objective of the paper was to assess potential of use of renewable energy sources and plans for future on the example of the selected ecological farms. The assessment herein was carried out based on the opinion of the owners of the researched farms. As much as 93% of respondents claimed that they are interested in this issue, and 72% expressed their opinion that they plan to use renewable energy sources in future, especially if the country will grant additional subsidies. In the farmers'opinions solar collectors are the most popular renewable energy carriers, which are considered the most promising. 56% of the respondents agreed that this is the best solution. While 8% of the respondents expressed their interest in using both, a solar collector as well as a heat pump and 4% was for using a solar collector and a wind power station. The fact that 57% of respondents plan to develop their farm and plan future investments is very advantageous (inter alia related to the use of RES in their farms).