Researchers have revealed the ideal amount of potted plants for our wellbeing, with their analysis surprising them by discovering that “too much” decorative nature can actually hinder mental health, rather than help. The team from California's Stanford University developed a new method to quantify varying “doses” of greenery and wooden materials—and used this, in a simulated office, to probe the effect of indoor nature on people’s wellbeing. While a handful of potted plants and a window with a