Cover cropping should be adapted on the location. The aspect of water consumption in semiarid farming areas (<600mm annual precipitation) should be prioritized. In 2012, a planting experiment was designed as a long-plot-system (standard method) at two locations with differing soil and weather conditions. The cultivated crops were: oil radish, tillage radish, yellow mustard, brown mustard, cress, buckwheat, linseed, common vetch, lentil, pea, canadian pea, egyptian clover, four mixtures and a plot of bare soil. 2012 was characterized by higher than average temperatures and lower than average rainfall. Investigative criteria included the rate of soil-coverage, the above ground biomass production, root length density and root biomass. The location at Untermallebarn showed a generally slower development and a lower degree of soil coverage due to the dry weather in late spring and summer of 2012. At Untermallebarn the earliest soil coverage was attained by tillage- and oil radish. At Zagging, due to damper soil conditions, the earliest soil coverage was attained by cress, tillage- and oil radish. The low the rate of dry matter production was due to the lower rate of soil coverage. Lentils, canadian pea and linseed had significantly lower leaf masses compared to the standard oil radish. The root mass (kg/ha from 0-30cm soil depth) was significantly higher under dry conditions. Tillage radish had consistently high root masses at both locations. In addition, the tillage radish showed a more favorable distribution of root length in the soil. Thus the soil moisture level was better utilized. Using a mixture of different cover crops that grow under different unfavorable weather conditions is advantageous because if one crop fails the thriving crops will still cover the ground sufficiently and quickly. In short growing-seasons a mixture as a greening measure (catch/cover crop) takes optimal advantage of the limited resources of soil, water and light.