The 24 specially commissioned chairs are to be auctioned today to get funds for urgent landscaping needed for eight London parks, including Hyde Park, Kensington Gardens and Richmond Park.
The recliners will be available to sun worshippers from 9 July - the height of London's deckchair season.
Rogers said the project was important to the ongoing maintenance of London's parks.
He said: 'The Royal Parks are the lungs of London and London is one of the world's greatest cities. They need continuous love and care.'
Celebrity designers from the worlds of food, fashion, music, art and architecture are contributing bespoke recliners.
They include fashion designer Alexander McQueen, photographer Mario Testino and chefs Rose Gray and Ruth Rogers, Richard Rogers' wife.
Sara Lom, director of the Royal Parks Foundation, said it cost £300,000 a year to maintain the parks' trees alone.
'The Royal Parks have their own nurseries and a dedicated team of plantsmen and staff, but that costs money and we could do with some help,' Lom said.