Hybrids origin of peppermint (Mentha x piperita L.), as well as, the ability of spontaneous crossings affect occurrence of phenotypic variability, which can be used in the development of new genotypes. Clone selection of peppermint from different growing locations resulted in deriving clones, which were compared to the peppermint Mitcham. Clones highly statistically differed over herb, leaf and essential oil yield. Variations of these traits were also the greasiest (CV = 42-59%). High yields were detected in three out of 12 investigated clones and two of them yielded equally to the check. The third clone (clone 15) had significantly higher herb and leaf yields (17%), as well as, essential oil yields (28%) than the check. The parameter indicating the relation between economical and biological yield was uniformed for all investigated genotypes (Hi =0.54).

Key words: peppermint, clones, productive traits.