Drought is an important factor affecting the growth and metabolic activities of plant species. Drought conditions inhibit plant growth, disrupt plant-water balance, reduce water use efficiency, and negatively affect the physiological processes in the plant. Drought stress in plants results from disruption of water flow in the xylem. Ob­struction of water flow leads to a decrease in cell turgor pressure and, therefore, af­fects cell elongation and expansion. Important physiological developments such as cell growth and division, enzyme synthesis, and protein synthesis slow down [3]. As a result, growth and development are also significantly affected, and yield is reduced. Drought stress causes a decrease in plant development parameters such as plant height, leaf number, leaf size, root length, leaf area, etc. and these are the first visible symptoms of drought [4–6]. Research has shown that the responses of medicinal and aromatic plants to salinity and drought stress have common points [1]. In order to ac­cess water resources in drought stress situations, plants accelerate root development in the early stages of stress and, conversely, slow down shoot development [7]. Under drought conditions, reduction of plant leaf surface and reduction of transpiration in­crease tolerance to drought stress. In many plants, dry conditions accelerate the aging process and abscission of old leaves, while roots adapt by developing the root system to reach water in the deep layers of the soil [8, 9]. Moreover, responses such as short­ening of height, less fruit/seed/biomass yield, and changes in the reproductive process occur [10]. Examples of water stress reducing plant growth in medicinal and aromatic plants include Hypericum brasiliense Choisy [11]. Catharanthus roseus [12] and Bupleu- rum chinense DC plant species [13].