The sale, which takes place on 26 April, will include many of the well-known garden statues, architectural urns and planters, as well as Denmans' garden and café furniture, catering equipment and plants in a sale that exceeds 200 lots.
Business asset valuers & auctioneers Marriott & Co. are managing the sale of the West Sussex company's assets for the liquidators.
The full lot catalogue is available at www.marriottco-auctions.co.uk. Online bidding begins 10 April.
There will be an open viewing day to view the lots at the Fontwell premises on 25 April 2017, 10am to 4pm.
Liquidator is Harrison Business Recovery and Insolvency.
The well-known 4-acre Denmans garden is the work of well known garden designer John Brookes, whose studio is based at the garden.