In recent years renewable energy sources (RES) have played a key role in current strategies to mitigate the impacts of global warming and independence on foreign energy sources. Miscanthus (Miscanthus x giganteus) is one of perennial grass which was identified as among best choices for low input bioenergy production. Our paper presents the relationship between the quality of soil and yielding as well as the biometrics features of miscanthus (Miscanthus x giganteus). Following this study Miscanthus x giganteus has best yields on soils of average quality, not too heavy. Obtained results can also conclude that achieving Miscanthus x giganteus yield at 2-4 kg DM (m²) ^-1 is possible in the case of plants which grow from 30 to 60 shoots for stump with a diameter of 7-9 mm and a height exceeding 2.5 m.