While some of the herbaceous plants grow very well in some regions, in some other regions they may not develop at all. Therefore, it is necessary to select suitable species to be produced. Producing species that do not fit the region means wasted labor. Landscape project's requirement is the most important element in the selection of outdoor plant species to be grown. Plants used in every region should be preferred mainly. Plant type and quantity should be determined according to demand. In our country, ornamental plants producers are more successful by focusing on the plants and growing techniques they consider important for them.