The exhibition gives visitors the chance to "shrink to the size of a caterpillar", find their way through a maze dotted with dangerous sticky plants and spiders.
Growth appeared in a pot the man thought was empty, and after consultations with numerous nurseries, it was determined the mystery plant was arisaema sikokianum.
While respondents surveyed said information from the University of Minnesota as more credible they were more likely to turn to neighbors and friends for gardening advice.