The Heligan estate was originally bought by the Tremaynes in the 16th century, and earlier members of the family were responsible for Heligan House and the (still private) gardens that immediately surround it.[1]

However, the more extensive gardens now open to the public were largely the result of the efforts of four successive squires of Heligan. These were:[1][2]

Rev. Henry Hawkins Tremayne John Hearle Tremayne, son of Henry Hawkins Tremayne John Tremayne, son of John Hearle Tremayne John Claude Lewis Tremayne, son of John Tremayne and better known as "Jack"

Two estate plans, dating from 1777 and sometime before 1810, show the changes wrought to the Heligan estate during Henry Hawkins' ownership. The first plan shows a predominantly parkland estate, with the site of today's Northern Gardens occupied by a field. The second plan shows the development of shelter belts of trees surrounding the gardens, and the main shape of the Northern Gardens, the Mellon Yard and the Flower Garden are all readily discernible.[3]

Henry Hawkins' descendants each made significant contributions to the development of the gardens, including the ornamental plantings along the estate's Long Drive, The Jungle, the hybridising of rhododendrons and their planting around Flora's Green, and the creation of the Italian Garden.[2]

Before the First World War, the garden required the services of 22 gardeners to maintain it, but that war led to the deaths of 16 of those gardeners, and by 1916, the garden was being looked after by only eight men. By the 1920s, Jack Tremayne's love of Italy, which had earlier inspired the Italian Garden, led him to set up permanent home there, and lease out Heligan. The house was tenanted for most of the 20th century, used by the US Army during the Second World War, and then converted into flats and sold, without the gardens, in the 1970s. Against this background, the gardens fell into a serious state of neglect, and were lost to sight.[1][2]

After the childless death of Jack Tremayne, the Heligan estate came under the ownership of a trust to the benefit of several members of the extended Tremayne family. One of these, John Willis, lived in the area and was responsible for introducing record producer Tim Smit to the gardens. A group of fellow enthusiasts and he decided to restore the garden to its former glory, and eventually leased them from the Tremayne family.[4]

The restoration, which was the subject of a six-part Channel 4 television series produced by Bamboo Productions and Cicada Films in 1996, proved to be an outstanding success, not only revitalising the gardens but also the local economy around Heligan by providing employment.[citation needed] The gardens are now leased by a company owned by their restorers, who continue to cultivate them and operate them as a visitor attraction.