Often, no special attention is drawn to the design of tree pits, although it contributes significantly to the overall aesthetic picture on the planting. But what kind of tree pit designs could meet, beside an aesthetic and vegetative, also an ecological and economic criterion? To answer this question, the diploma thesis at hand analyses 99 trees with and without planted tree pits in Mödling. After a thorough appraisal of the trees and after analysing the tree pits and their planting, samples were retrieved for sieve analysis and to carry out an analysis regarding the trees nutrient. The examination showed that the design of the tree pit planting with perennials, shrubs or grasses, or without any planting in most instances has an impact on the condition of the trees trunk, the overall aesthetic picture and the aggregation of the soil within the tree pit. However, it could not be detected that the design of the tree pit has an impact on the treetops vitality. Also the nutritional analysis of the samples gave no significant results regarding the advantages and disadvantages of tree pit planting. However, some differences can be outlined: It is certain that in Mödling tree pits planted with perennials are in a good condition and barely no aggregation of the soils upper part can be determined. Damages of the trees trunk are more likely to be found in tree pits without any planting. Consequentially, it can be said that the planting of tree pits has a protective function against mechanical damage of the tree trunk. Trees with perennials or shrubs in its tree pits also show lesser marks of dogs urine. Tree pits without any planting or tree pits with grass are substantially more contaminated than those planted with perennials and shrubs. Tree pits without any planting are mainly exposed to aggregation of the soils upper part.