The research aims to study the effect of five harvesting wed (vegetative growth, the beginning of open inflorescences flowering, the beginning of flowering, full bloom, and completeness of the vegetative growth at the beginning of the month of September and that of plants that have already cutted), some of the morphological and productivity indicators for common thyme Thymus vulgaris L . Experiment was designed by the complete randomized manner in three replicates. Statistical analysis was performed by Anova test using Genestat and account teams less moral LSD at a significance level of 5%. Results showed superiority date mower fifth morally on the rest of the dates in terms of index number of branches (16.50 branch / plant), productivity of the wet weight (55.00 g / plant), productivity of dry matter (27.08 g / plant), while the superiority of the date of the second mowing morally the rest of the appointments in terms of the percentage of essential oils (size / weight) (2.10%), also reached the top of the plant at the time of his high mowing fourth (21.50 cm). Highlights the importance of the results by identifying the optimal harvesting date to get the most fresh and dry weight of material and the highest percentage of essential oil, and the resulting economic return to the farmer healthy and beneficial to the consumer, with the continued preservation of the existence of the plant and its tender.