The Jewish Community Centre for London marked Tu B'Shvat by expanding its tree project, designed to foster environmentalism and community relations.
Fifteen schools - a mix of private, state, Jewish and other denominations - are each nurturing a fruit tree sapling.
Every school will donate its tree to a local community institution - possibly a hospital, children's home, hospice, charity office or a park.
David Yehuda, who spearheads the JCC's social action programme, spoke about the project to pupils at St Margaret's School in Hampstead.
He said it provided "a practical opportunity for kids to learn about environmentalism, the importance of putting something back into the community and a little bit about Tu b'Shvat".