"After funding the makeover of 11 major parks across London during his first term the Mayor is now offering to support a series of smaller public spaces throughout the city," said a spokeswoman for the mayor.
"As part of a £2m funding pot, grants of up to £50,000 will be available for local authority-backed schemes. Early in 2013 community groups will be able to apply for grants of up to £20,000 for neighbourhood schemes."
She said the mayor would also pump a further £1.7m into his street tree-planting initiative, which delivered 10,000 new street trees during his first term. This will take the total to 20,000 by March 2015.
Finally, cash will be freed up to continue the RE:LEAF community grant scheme that funds voluntary action by local community groups. Grants of up to £10,000, from a £300,000 pot are available to any group representing the wider community.
Johnson said: "Investment in public spaces is crucial for my aim to lengthen London’s lead as the best big city in the world. By making streets leafier and transforming neglected pockets we can make it even better to live, work and invest in."