A good choice of species and knowledge of their ecological needs affects the price of the overall project solution, but also the price of its maintenance. Maintaining plants in interiors is an important item of every project, and it affects the final appearance. The health and psychological role of using plants in the interiors of business premises is recognized by employers who order the decoration of business premises, but the maintenance of plants is often neglected. Succulent species are certainly less demanding species in terms of maintenance, while a large number of common species for interior decoration need regular care at least twice a week. The aim of this thesis is to investigate which plant species are represented in the interior design of business premises of two companies in the city of Zagreb, which care and maintenance measures are necessary and with what frequency. Plant species in the office premises of the companies "Arch media d.o.o." and "Notch d.o.o." in Zagreb were inventoried, their taxonomic affiliation and origin determined. Environmental conditions in rooms with plants (temperature, light, relative humidity) were analyzed. From February to April 2023, it was monitored which care and maintenance measures were applied and with what results. After the inventory was carried out, twenty plant species from six families were identified. Most plant species belong to the Araceae family, and the most represented species are Epipremnum aureum and Chlorophytum comosum. Plant species of tropical origin predominate, and among the succulent species recorded are Zamioculcas zamiifolia and Sansevieria "Mikado", which are located in the company "Notch d.o.o.". The company "Arch media d.o.o." does not have any succulent species. A larger number of plant species was recorded in the company "Arch-media" (thirteen species), and a smaller number in the company "Notch d.o.o." (nine species). Most plant species, in addition to their decorative role, perform some spatial function, the most common of which is creating privacy, dividing space, softening rough architectural lines, and reducing glare. Both companies mostly deal with leaf potted plants.