This study was conducted for one year from September 2014 to determine the population dynamics of Tetranychus urticae and Euseius Scutalis (A.-11.)  on omamental,  medicinal and aromatic plants (Hibiscus sabdarriffa  L.,  Mentha vridis L., Mentha piperita L. and Syngonium podophyllum Schott) at Giza  and Qualyuhia governorates. A positive correlation occurred  between population densities of both mites and weather factors.  T. urticae population on Mentha vridis L., Hibiscus sabdarriffa L., Mentha piperita L. and Syngonium podophyllum  Schott increased to reach population on Nov. 1^st with an average of eggs and moving stages, respectively (23.50 and 30), Dec. 1^st (26.00,and 9), Jun. 1^st (37.00,and 24.25), Sept. 1^st  (37.00  and 24.25) and Euseius scutalis on May 1^st (15.25and 24.75),  Dec. 1^st (25and 22.25),  Dec.l5th (26.00 and 42.25).  Then the lowest level of population on Sept.l5th (3.25  and 12.5),  Apr. 1^st (9.50  and 6), Sept. 15^th (2015), ( 11.50 and 18.5),  Mar. 1^st (8.50 and 12.75) and Euseius scutalis Sept. l5^th (3.25 and 3.75),  Sept. 1^th (9.50 and 14.75),  Jan. 1^st (9.50  and 15.55), Mar.  1^st (9.25 and 13.25) in  this data showed that population of T urticae and E. scutalis increased to high value in  Nov. and Dec. and decreased in  numbers on Mar. and Apr. cause of this require to removing weeds in time after this menthes and plants condition.