The role encompasses responsibility for 120ha of gardens across the Windsor Estate, including The Savill Garden and The Valley Gardens, as well as the private garden at Frogmore House.
Anderson comes to the role from Exbury Gardens, within the New Forest National Park. He has been head gardener of the 80ha estate since 2005.
He studied at the Royal Botanic Gardens, Kew, and the National Botanic Gardens, Dublin, and has held the position of head gardener at both Inverewe and Mount Usher Gardens. When he starts in June, Anderson will be looking to maintain the high standards set by his long-serving predecessor, the late Mark Flanagan. Annually, the gardens of Windsor attract 1.75m visitors.
Paul Sedgwick, deputy ranger of Windsor Great Park, said: "I am delighted to welcome John, with his huge experience and knowledge, to our team at Windsor. His particular expertise will ensure that our gardens continue to excel and to please the millions of visitors that they attract."
Anderson said: "I am honoured to have been selected to be the fourth holder of the prestigious position of Keeper of the Gardens and look forward to moving to Windsor with my family to take up the position. It has been a lifelong dream to work at the Savill and Valley Gardens, both international horticultural treasures. It will be a privilege to lead an excellent team of horticulturists in further developing the gardens and enhancing the plant collection."
The Windsor Estate forms an important part of The Crown Estate’s £11bn real estate business. It estate manages a broad range of activity including The Great Park, formal gardens and forestry, leisure, property, hospitality and education.
Under the Crown Estate Act 1961, the Windsor Estate is the only part of The Crown Estate’s portfolio that by law cannot be sold. The Crown Estate is also required to maintain its character as a Royal park and forest.