Gardening is good for you, going by tests carried out by the University of Helsinki, which showed “significant” potential health benefits from keeping just a few potted plants inside your home. “One month of urban indoor gardening boosted the diversity of bacteria on the skin of the subjects and was associated with higher levels of anti-inflammatory cytokines in the blood,” said Mika Saarenpää, a doctoral candidate at the university’s Faculty of Biological and Environmental Sciences. The tests exposed some people to “a growing medium with high microbial diversity emulating the forest soil” and…