Local residents joined together in 2005 to transform an abandoned site in Sheffield into Firth Park Community Allotment.
Drop-in gardening sessions and workshops are held at the allotments for residents and children, and produce is shared out among the community.
Meanwhile, in South Central Los Angeles, US guerrilla gardener Ron Finley, who calls himself a "renegade gardener", is starting a revolution in street growing, something that has brought him widespread praise.
Finley was asked to give his first UK talk at Sheffield's Festival of the Mind, a collaboration between the university and the city council, at the end of September.
He visited Firth Park to mark the 50th anniversary of RHS Britain in Bloom, meeting volunteers with Louise Cook and Nigel Dunnett of Sheffield University. Dunnett said: "Ron Finley is one of the most inspiring people in horticulture today. It was a delight to join up with the RHS and to visit the RHS community projects with him."