Thomas Guy Hart Dyke (born 12 April 1976) is an English horticulturist and plant hunter from the Hart Dyke family. He is the son and heir of Guy and Sarah Hart Dyke at the family seat of Lullingstone Castle, Eynsford, Kent. He is the designer of the World Garden of Plants located on the property. The World Garden contains approximately 8,000 species of plants, many collected by Hart Dyke from their native environments. He presented an episode of Great British Garden Revival in 2013.