In 2005, Lydiard Park received funding from the Heritage Lottery Fund to restore significant 18th century landscape features, including the Walled Garden. At this time, the garden was in a neglected state and contained only a rough grass lawn. Aerial photography and archaeological surveys, conducted by Wessex Archaeology determined the route of the original paths and rediscovered the deep well and stone trough.
Letters in the Lydiard House Collection from Lady Johanna St John to her gardener written in the 17th century gave clues to the types of flowers and herbs planted in the Lydiard Park gardens and wall panels, painted by Diana, 2nd Viscountess Bolingbroke in the 18th century now on display in the Dressing Room of Lydiard House, showed jasmine, narcissi and roses. These helped the Lydiard Park gardening team source historically accurate plants for this Georgian Walled Garden.
Work began in 2006 to replant the Walled Garden perennials, annuals, trimmed shrubs and fruit trees. The gardeners were supported by a huge team of volunteers working to restore this historic garden to its former glory. It opened to the public in May 2007 and, as the planting has become more established, is a fascinating garden to visit in all seasons.