Increasing urbanization has led to less green environments, and even more, to people spending more time indoors without any direct contact with nature. This development has a negative effect on our health. Increasing green space in public environments can have a positive impact on people as it could influence mental health (e.g. relieve stress) and behaviour (e.g. enhance social contact, stimulate exercise), which would in general improve productivity and well-being. Royal FloraHolland wants to promote the functional aspects of plants as part of their innovation agenda, which aims to develop and test new earning opportunities for entrepreneurs in the horticultural sector. In collaboration with them, we aspire to create a scientifically sound business model that would provide a pleasant and healthy environment for the users of university buildings and provide widely applicable information on making indoor work environments healthier.