An increasing number of plants are being planted in extreme conditions, for example, on roof gardens or to cover the facade of houses with greenery. To offer gardeners confidence when planting, the vegetation must first be carefully monitored and tested for their suitability by specialist institutions. At universities and specialist institutions a test of vitality (state of health) is usually carried out. Other organisations focus on other parameters, such as the assessment of habitats or the display of petals. Despite the various methods and procedures, the main aim of the research is always the determination of the best possible variety and type for the individual plot and use. Different assessment systems make the understanding of, and working with, plant evaluation difficult. Through the comparison of existing assesment systems and methods, I will in this dissertation attempt to produce a standard evaluation note for the rating of perennials. The different approaches of plant identification will be clearly shown and explained and the strengths and weaknesses of the systems will be demonstrated. Through the careful monitoring of vegetation and a continuing experiment, the strong and weak points of existing or adapted evaluation systems of the IBLB will be worked out. As a result of theoretical research and practical application a new evaluation system, whose gauges will be combined with visual evaluation parameters, will evolve. All parameters, which prove themselves useful in the evaluation of perennials at the IBLB, will be integrated into the evaluation system. With a pre-programmed Excel table, into which evaluation and measurement results can be fed, the result of the evaluation will be able to be determined. A system will be developed which allows the comparison of results despite individual assessments. An evaluation note will be freely available for students and staff at the institution in the future.