David Trehane has taken on the 60-year-old company in Wimborne, Dorset, from his uncle, Jeremy, who with David's mother, Jennifer, will stay on in an advisory capacity.
David explained: "I have two incredible pools of talent to draw on in the immediate family. Jeremy has built up a business with strong roots and excellent growth potential - Jennifer has the contacts to help me put that growth in place.
"On the nursery I also have the benefit of vastly experienced and knowledgeable staff. Our nursery manager, Lorraine Keets, has been at Trehane's for 29 years and I'll be working closely with her in the months to come as we develop the nursery for future generations." He is currently managing director of the Dorset Blueberry Company.
The nursery was founded by David's grandfather in 1957 and specialises in Camellias and other ericaceous plants. Since 1994 it has been run by Jeremy, though the pair have working together for a year to ensure a smooth transition.
Jeremy said: "I know that David will bring a new entrepreneurial spirit to the nursery and I'm looking forward to stepping back and watching him bring his ideas for the future to fruition."