“…We observed that, regardless of whether or not they involved gardening/horticulture activities, interventions were more likely to be effective when they afforded: 1) shared/group experiences; 2) acquiring knowledge and learning skills; and/or, 3) opportunities to have control/autonomy, provide care, or be responsible for nature. Each of these factors: social interaction (Bassuk, 1999;Graney, 1975;Mendes de Leon, Glass, & Berkman, 2003), lifelong learning (Narushima, Liu, & Diestelkamp, 2013, and having responsibility/autonomy (Kloos, Trompetter, Bohlmeijer, & Westerhof, 2018;Langer & Rodin, 1976), have been reported to benefit older adults' wellbeing, in terms of ADL (Mendes de Leon et al, 2003), happiness (Graney, 1975), cognition (Bassuk, 1999), depression (Kloos et al, 2018), general psychological wellbeing (Kloos et al, 2018;Narushima et al, 2013), general overall health (Langer & Rodin, 1976), and life satisfaction (Kloos et al, 2018), i.e. similar outcomes to those reported in this review.…”