The Garden Centre Group (TGCG) is has sent letters to its 13 regional managers outlining a risk of redundancy.
A re-organisation of roles will mean centres are managed more by size than by region. The process is due to complete by November.
The move is part of Terra Firma’s first wholesale reorganisation for the 129-centre business it bought for £276m in March 2012.
The group has brought in several senior staff from outside the industry since taking over, but has left much of the on-the-ground operations alone.
A group representative said: "The Garden Centre Group is experiencing a time of great change as we grow the business under our new senior team and focus our efforts on how best to serve our customers.
"We are considering how we might best achieve this through a variety of different options and proposals, however at this stage these are internal management processes with no agreed plans as yet. If and when any of these options and proposals are finalised, we will of course be happy to communicate further."