Buckingham Palace gardens to reopen this summer, with visitors able to picnic on the lawn for the first time The gardens, which were closed in 2020, will reopen for guided tours in spring and a new summer ticket allowing visitors to roam freely Buckingham Palace gardens will reopen this summer Credit: Royal Collection Trust/John Campbell The Buckingham Palace gardens will reopen this summer and visitors will be able to picnic on the sweeping lawn for the first time. The 39-acre gardens, closed last year due to the pandemic, will open from July to September, allowing visitors to freely roam the grounds of Her Majesty’s official London residence.