Iford Manor Gardens in Bradford-on-Avon will be open to the public on Saturday, 24 April.
Used as a major location in 2020 fantasy film The Secret Garden, which starred Julie Walters and Colin Firth, the gardens will be open from 11am to 4pm as part of the National Garden Scheme.
The scheme gives visitors unique access to more than 3,600 private gardens in England and Wales, raising money for charity.
Admission to Iford Manor Gardens is priced at £7.50, with no children under 12 admitted. Booking is essential and can be done via www.ifordmanor.co.uk.
The website also has details about other opening times and conditions, and about the history of the gardens.
The National Garden Scheme says in its description of the gardens: "An exemplar of Harold Peto’s garden design at his former home, this 2½ acre romantic garden provides inspiration to many and was used as a key location in The Secret Garden (2020).
"Restored and extended by the current owners, Troy Scott Smith was recently appointed Head Gardener.
"Steep flights of steps link the terraces with pools, fountains, urns, colonnades and statues.
"As garden is on a steeply terraced hillside with many flights of steps, wheelchair access is limited. Please call for details."
Other gardens opening on Saturday include Holloway and New Lower Lye in East Knoyle, Salisbury.
Planned garden scheme openings of Corsham Court and Oare House, which is near Pewsey, have been cancelled.
Would-be visitors to all scheme gardens are advised to check www.ngs.org.uk frequently.