Garden centre chain Notcutts is talking to Garden Pride with a view to buying the garden centre on 6 December.
Garden Pride is in Ditchling, East Sussex and has a £5m turnover. The 10ha site has been run by Trevor Wenham for 20 years. He and Kathleen McDonald will retire but act as consultants.
Notcutts interim chief executive Andrew Staff said: "Garden Pride is a great fit with the Notcutts business."
Wenham said: "I am delighted to be selling to a family-owned business."
Garden Pride will be Notcutts 19th centre.