Lots include shrubs and trees, catering equipment, furniture and retail stock.
A statement on the Bidspotter website said: "This is not a business that was struggling, it's a couple who have made a lifestyle choice to close this business. They won many gold awards at the Chelsea Flower Show and can call members of the royal family in their customer base.
"The auction will be live and online and start at 9.30am. There is a £50 cash deposit for onsite bidding.
"Day one consists of all indoor plants, Extensive Commercial Catering Kitchen, vast range of indoor retail stock, some great individual pieces.
"Day two consists of all Outdoor Plants, Mature Trees and Shrubs, all outside pots plus a host on indivudal Pieces, stoneware etc."