Director and co-founder, David Bellman revealed his intentions after his centre was named as Somerset's best family-run business at the annual Somerset Business Awards.
He said: "This is wonderful and after a life-long dedication to Somerset and our garden centre, I am now handing over to my son-in-law, Mike Lind."
Lind has recently taken on the role as the garden centre’s managing director.
General manager Norma Moore said: "We are all absolutely delighted with our award and will be creating a cabinet within the garden centre to display it, and the other awards we have recently won, for all to see. As this is our 30th anniversary year it couldn’t have come at a better time for us."
The Albert Goodman Family Business Award recognises businesses with one or more family members involved in the management and exerting a significant influence on the company.
Monkton Elm Garden & Pet Centre is celebrating its 30th anniversary this year. The garden centre was launched in 1982 and is run by the Bellman family.