Gardening and nutrition lessons for children can affect knowledge, actions, and behaviors that support more healthful lifestyles. The objective of the study described in this article was to determine the effectiveness of a master gardener--led education program for youth at a week-long summer camp in Iowa. Garden knowledge was assessed via a pretest, a posttest, and a 6-month follow-up. Campers increased their garden knowledge after the week-long camp. In addition, a 6-month follow-up questionnaire was mailed to parents to obtain information about changes in participants' behaviors. More than 75% of parents noticed positive garden-related behavior changes in their children.