Preliminary experiments were set to assess the effect of the flowering period of plant, plant part and solvent of extraction
(acetone or methanol) on productivity of total phenolics and correspondingly antibacterial activity. In all, 12 samples were analysed during the study. Fig. 1, represents the total phenolic content TPC (mg/g) obtained using 2 solvents of extraction and 3 different period of collect (April, May and June) for each sample.