Increasing interest of people on urban gardening has attracted attention to new, space-saving plant containers. Currently, there are different kinds of containers available on the market, which differ in material and form. Which pot is best suited for urban gardening in a limited space, is yet unknown. A new container made from white clay, which has four ridges on the inner side, is in the focus of this study. The effects on plant growth were examined. As part of the analysis of a total of 24 tomato plants, 12 of the variety `Moneymaker and 12 of the variety `Roma, which were cultivated in two different container types (with or without ridges) and two different container sizes (four and eight liters), were investigated with respect to their root, plant and fruit growth, fruit deficits and the in-gredients of the fruit. The factor “ridges” resulted in the root zone in both, a significantly lower growth rate of the fine and total root masses, as well as a smaller root volume. The number and length of lateral roots was reduced. In the four-liter pots with ridges the tomato fruit had higher weights. In addition, ridges caused a lower carotenoid content in `Mon-eymaker” and a higher in `Roma. The content of reducing sugars was increased in `Roma. Evidently positive impacts of the ridges could not be derived from the present results, however, a second year with experiments is necessary to decide, whether this con-tainer form is suitable for commercialization.