The use of plants in decorating offices, schools, shopping centers and other interiors has become widespread thanks to numerous studies that have shown the positive impact of plants on people's physical and mental health. The influence of the amount of indoor plants on residence preferences, which was examined in this research, remains insufficiently researched. Additionally, the connection between exposure to nature, and the use of indoor plants in interior decoration with room preferences was examined. We also wanted to explore the influence of the external factor of the presence of plants during the research on the results of the research. The participants (N = 219, 161 women and 57 men) were shown a total of 6 pictures of living rooms in 3 different versions: without indoor plants, with a small proportion of plants and with a large proportion of plants. Findings reveal a significant preference for rooms with plants versus those without plants, but no difference was found between preferences for living rooms with high green cover ratio and living rooms with low green cover ratio. The preference for living rooms was not related to the participant's exposure to nature, nor to the tendency to use indoor plants in interior design. Participants who filled out the questionnaire in a space that contained plants did not differ in their living room preferences from participants who filled out the questionnaire in a space that did not contain plants. These results provide a basis for future research, the results of which would offer practical guidance on how many houseplants to use in interior design, and guidance for future research.