The main materials composing the outdoor space are the landscape plant materials. Even though grass plants out of landscape plant materials are efficient for water consumption and management, still, the types of grass used for landscape are extremely few. Thus, this study explores the preference on grass plants in apartment complexes to provide basic information for grass planting plan and design in the future. For this study, 171 questionnaires of two sites in Daegu and one site in Seoul were used for final analysis and the results are as follows. First, in the results of the awareness of grass plants, “do not know” (80.7%) was considerably higher than “do know” (19.3%). Second, in the results of the most preferred place for planting grass plants in apartment complexes, “trail” (31.2%) was the highest, followed by “space around the apartment building” (17.5%) and “waterscape” (15.4%). Third, for the preference on the shape of grass plants, “Upright-arching” (38.0%) was the highest, followed by “Upright-divergent” (29.2%), “Tufted” (19.9%), and “Mounded” (12.9%). Fourth, for the preferred height of grass plants, “Short size” (50.3%) was the highest, followed by “Medium size” (36.8%), and “Tall size” (12.9%). Fifth, for the preferred color of grass plants, “white” (27.7%) was the highest, followed by “green” (25.7%), “red” (20.5%), “yellow” (17.2%), and “blue” (9.0%). This information could be used as reference in case when planning and designing of grass plants in apartment complexes and further research including different regions is needed.

ABSTRACT
 1. Introduction
 2. Methods
  2.1 Subject and Scope of Study
  2.2 General Description of Subject Sites
 3. Results and Discussions
  3.1 People’s Recognition of Landscape PlantMaterials
  3.2 Recognition of Grass Plants
  3.3 Need for Grass Plants
  3.4 Preferred Space for Planting of Grass Plantsin Apartment Complexes
  3.5 Preference for Grass Plants by Appearance
 4. Conclusions
 References

• Hyejun Park(Dept. of Landscape Architecture, Graduate School, Yeungnam University)
• Youngjoo Kim(Dept. of Agricultural Engineering (Institute of Agriculture & Life Science) Gyeongsang National University)
• Jihwan Park(Dept. of Landscape Architecture, Mokpo National University)
• Keunho Kim(Dept. of Forest Resources and Landscape Architecture, Yeungnam University) Corresponding author