Salvadora persica is the most used medicinal shrub in the Arab world. This experiment was conducted to evaluate seedling performance at different rates of NPK. Seedlings were treated with N:P:K at 4:2:2 (N:P:K 2:2:2 g + 2 g of nitrogen supplemented as ammonium sulfate), 6:3:3 (N:P:K 3:3:3 g + 3 g of nitrogen supplemented as ammonium sulfate), 2:1:1S (N:P:K 1:1:1 g + 1 g of nitrogen supplemented as ammonium sulfate), 2:1:1U (N:P:K 1:1:1 g + 1 g of nitrogen supplemented as urea), 4:1:1S (N:P:K 1:1:1 g + 3 g of nitrogen supplemented as ammonium sulfate), 4:1:1U (N:P:K 1:1:1 g + 3 g of nitrogen supplemented as urea), 6:1:1S (N:P:K 1:1:1 g + 5 g of nitrogen supplemented as ammonium sulfate), 6:1:1U (N:P:K 1:1:1 g + 5 g of nitrogen supplemented as urea) in addition to the control. The results indicated that NPK application significantly affected the vegetative and root growth parameters and the chemical contents. Among the various treatments of NPK, the application of 6:3:3 rates showed the highest values for aboveground parts, root parameters, and greenness level. Therefore, the present study demonstrates the optimum NPK levels that can enhance seedling growth throughout the nursery period.

Two individual experiments were done. The first experiment aimed to study the effect of Phos root-x as newly rooting promoter at different rates (0, 0.5, 1, 1.5, 2, 2.5 and 3 cm 3 /l) on rooting of the terminal cuttings of rosemary plants. This study was carried out on 20 th of July during the two seasons of 2019 and 2020. The experiment consisted of 7 treatments with 3 replicates, every replicate contained 3 cuttings per treatment. Data collected refer to that the 2.5 cm 3 /l of the newly rooting promotors were the best. Chemical analysis of terminal cutting refers to a decreasing in C/N ratio of terminal cuttings with increasing of Phos root-x concentrations. The second experiment was done on 25 th of October in the same seasons, 2019 and 2020 for both terminal and middle cuttings and treated with Phos root-x complex with or without IBA, the treatments were 0, 1, 2, 3 cm 3 /l of Phos root-x with or without IBA at 0, 100, 500 ppm in combination. The experiment consisted of 24 treatments; each treatment consisted of three replicates with 3 cuttings per replicate. Data showed that for all parameters the best types for rooting was terminal cuttings, and a higher concentration of phos rootx favored better results especially with 3 cm 3 /l level. These results may be due to the higher concentrations of amino acids complex inside the newly rooting promotor compound (Phos root-x).