Despite the fact that successive sowing of maize was legally limited due to the occurrence of the corn rootworm beetle in 2003 and the integrated crop production was introduced in 2004, maize is still the most common and desired crop on arable and livestock farms in Slovenia. With a focus on the economic motives for the production farmers are gradually beginning to consider also the phytosanitary viewpoint, but the planning of a crop rotation is a demanding task, especially for younger farmers with no previous experience. The results of the analysis of crop rotations on conventional and integrated arable and livestock farms in north-east and western Slovenia in the period from 2000 to 2009 show that the maize monoculture has been supplemented by other grains, mostly wheat and barley, but legumes and supplementary crops are still missing from the rotation. With newly introduced crops to Slovene fields the need for new and modern agro-technical measures is increasing and also the need for improved knowledge of biological characteristics of individual varieties and species with their suitable order and share in the crop rotation. To help the farmers find the best solution for their production we have prepared some recommendations for the crop rotations with the main and supplementary crops, following good and proven examples of crop rotations used in the past. Whether farmers will use them on their farms depends not only on their technical equipment and knowledge, flexibility and receptiveness, but also on the legislative measures and sustainable nature of EU agricultural policy where farmers got used to be paid for every function and production that is environmentally and food friendly.