Frosts Garden Centre Group md Paul Wright has left the company after a review of its finances.
Frosts Garden Centre and Frosts Landscape Construction is now under the control of a single group md, James Frost.
A statement from the company said: "It should be stressed that both businesses are trading profitably and that this review has been conducted from a position of strength."
Mr Wright joined Frosts Garden Centre Group in February 2004 from Choices UK where he was operations director.
Last year, the company reported pre-tax profits of £27,000 for the year to July 2009, an increase of 37% on the previous year.