Especially the use of drought-resistant plant species reduces maintenance and irrigation costs, and plants increase the retention and success to continue its life in arid landscape. In this study, some plant species used have been studied to determine their tolerance to drought stress in gardens and parks in Kastamonu. For this purpose, germination trials have been in conducted -, -, -, and -Bar water stress. Landscaping applications commonly used some species such as Cupressus sempervirens L., Ailanthus altissima Mill. Swingle, Pyracantha coccinea Roem, Thuja orientalis, Pinus sylvestris L., Sophora japonica, Cedrus libani A. Rich., Acer pseudoplatanus L., Pinus brutia Ten., and Pinus nigra Arnold. ssp. pallasiana Lamb. Holmboe. Their seeds were evaluated different levels of water stress in the germination percentage. PEG solution was used in the formulation of water stress. The seeds were exposed to constant temperature of °C for a period of days at germination cabinet. As a result, this experiment calculated germination in different water stress levels what percentage has fallen, so the least affected by increased water stress was studied to determine the species. Also results showed increased water stress and reduce the percentage of germination in all species. The highest level of water stress -Bar, which was also obtained stress level proportional germination values Pinus nigra Arnold. ssp. pallasiana Lamb. Holmboe . % and Pinus brutia Ten.. % .