Learn about houseplants and native plants, tour gardens historic and modern and find a pop-up plant bar. This July, there are dozens of talks and classes to learn about plants, virtual and in-person in the Lancaster County region. Thursday, July 1, 7 p.m. History of Black Horticulture. This online presentation (from the Friends of Hershey Public Library, Manada Conservancy and Hershey Gardens) will follow Longwood Gardensâ community read, âThe Home Place: Memoirs of a Colored Manâs Love Affair with Nature.â Writer Abra Lee will discuss the book and the history and significance of Black horticulture and conservation. Free. Register online.