Just ordinary admission charges to the gardens, South Yorkshire's only grade-one listed landscape, will apply for the events which begin on Saturday, November 27.
The attraction near Barnsley is made up of more than 50 acres of gardens and 500 acres of parkland. The estate features 26 buildings, monuments and follies, including the main house, all of which have been – and in some cases still are – the focus of a massive restoration scheme.
More than 17m has been spent so far on Wentworth Castle Gardens' restoration.
One of the results has been the rediscovery of rare formal gardens and national collections of rhododendrons, camellias and magnolias.
A huge fundraising drive is also currently under way to restore a derelict glasshouse on the estate.
As part of National Tree Week, Walk and Talkevents will run on both Saturday, November 27 and Sunday, November 28, from 1.30pm to 3pm, when experts will take visitors on a walking tour of the estate's trees. Tours will also be held on Thursday, December 2 from 10.30am to 12.30pm around Stainborough Park, and on the same day from 1.30pm to 3pm around Wentworth Castle Gardens.
A self-guided family tree trail will also run throughout the whole week, beginning from Long Barn Visitor Centre.
Visitors are advised to wear "stout footwear and warm clothing" for all of next week's events.