In the VENLO type greenhouses with a total area of 3 ha we cultivate roses in the all year around cycle with assimilation lighting which ensures high quality flowers in the winter. The whole crop is watered with rain water collected from roofs and gutters into a special pool. The climate computer PRIVA takes care of the course of technological process. The greenhouse facility is ecologically heated, because 80 percent of comes from gas and CO2 produced is used for feeding plants and speeding up the process of photosynthesis.