The study was aimed to assess the effect of Trichoderma harzianum Bi on qualitative and quantitative traits of polianthes, including stem length and diameter, inflorescence floret number and leaf length of the main and lateral bulbs; an experiment with completely randomized design having four treatments and seven replications was completed in greenhouse conditions. Enriched coco peat with Trichoderma in different concentrations (0, 20, 50 and 100%) of pot total coco peat, were applied as treatments. Main media mixture was 40% of coco peat+ 40% of field soil+ 20% of perlite. Enriched coco peat with 100% concentration significantly increased stem length and diameter, floret number and leaf length in both main and lateral bulbs compared with control sample. There were no significant differences between treatments for stem length and diameter, neither for floret number. Also, treatments of 50% and 20% enriched coco peat for stem length and diameter, and floret number, did not significantly differ from control variant. By applying 50% enriched coco peat the floret number and leaf length of the main and lateral bulbs significantly increased compared with control variant. The data obtained from the experiment showed that Trichoderma enhanced qualitative and quantitative traits of polianthes cut flowers.