Permanent perennial plantings are an alternative to common annual plantings or (ground cover) trees. With proper planning, they are low-maintenance, cost-effective to manufacture and aesthetically pleasing. Therefore they include many aspects of sustainability, which comes up to the requirements of the current public space planning. The aim of this work is to make the quality of existing perennial plantings in the third district of Vienna in an objective form measurable and subsequently draw conclusions concerning the environmental, social and economic sustainability. The basis for this is a literature research on the use of perennials in present time, as well as the current position of sustainability in the open space planning. Based on a literature research, a recording and evaluation of all perennials in public areas in the third district of Vienna, by using measurable criteria of aesthetic, of care of state or of degree of coverage follows. Subsequently a classification of quality characteristics and an analysis regarding the sustainability aspects could be made. The obtained results show that the consideration of the location factors of plants and the professional planning are essential criteria for a high-quality perennials planting. A holistic view starting with the new plant up to the care is decisive for a qualitative and sustainable use of perennials. It was noted that the quality and sustainability are in alternating relationship, as higher-rated quality perennials usually entail positive aspects of sustainability. This is reflected in the recognition and observance of ecological cycles, as thereby the vitality of the individual plants can be promoted and therefore not only contribute to the environmental sustainability, but also detect impacts on quality of a perennial planting and subsequently to social and economic aspects of sustainability.