WENTWORTH Castle Gardens will permanently close to the public in the spring.
The Heritage Trust behind the gardens says it has not been able to make enough money to cover the running costs and management of the site - despite a £3.74 million restoration of the garden's Victorian conservatory back in 2013.
John Edwards, Chair of the Wentworth Castle and Stainborough Park Heritage Trust said: "In recent years we have not been able to make enough money to cover the running costs required to manage the site and keep the gardens open as a year round visitor attraction.
"As a result of this, we are working with the support of Barnsley council to manage the closure.
"We would like to give assurance that every effort will be made to honour all existing weddings and celebratory events for 2017 and we will contact all parties directly.
“We have taken this difficult decision towards a managed closure of the site in the expectation that a sustainable future can be found.
"We are working hard to ensure that this beautiful and historic Grade I listed landscape will be maintained and the gardens preserved for many generations to come."