"Many of these gardens have never been open to the public before, and they feature outstanding planting and design ideas," said a representative for Dorling Kindersley.
The 10 gardens are to be found around Notting Hill, Fulham, Camberwell, Wimbledon and Clapham, and will be open for free throughout the bank holiday Monday.
One garden, The Chase on Clapham Common, was designed for a plantsman by Charles Rutherford. Charlotte Rowe designed a small town garden in Shepherd's Bush with a west-coast-of-America feel.
"They intend to inspire budding gardeners whatever your style or restrictions on space. They range from a functional communal roof terrace off the King's Road to a bold architectural garden at Great Ormond Street Hospital."
Seven of the gardens in The Great London Garden Trail have been designed by members of the Society of Garden designers.
Three won a competition run by DK and the RHS, supported by Homes & Property. Each garden won a £5,000 garden makeover by designers Chris Collins and Sven Wombwell.
"These three gardens were chosen as they represent a variety of challenges facing London residents with a garden or outdoor space."