The project, led by London Mayor Boris Johnson, aims to provide a network of community tree nurseries across London and encourage individual Londoners, businesses and organisations to plant more trees.
It commits to increase tree cover by five per cent by 2025 – equating to one tree for each of the 8.8 million Londoners expected to live in the capital by then.
The idea is to not only to make the capital more attractive but to help combat the effects of climate change.
The Next Field founder Peter Wilkinson announced the win on Twitter yesterday, saying: "Just appointed to deliver the GLA community tree nursery study, part of the Mayor's Re:Leaf programme."
The former Bristol City Council parks service boss declined to comment further at this stage.
The Mayor’s Street Tree Programme has led to 16,300 street trees being planted so far across 23 boroughs and two new woodlands have been created in the boroughs of Croydon and Barking and Dagenham as part of the London Ambassador Legacy programme and new orchard and woodlands in Redbridge, Greenwich, Ealing and Bexley under a different scheme.
Tree planting events led to a further 20,000 trees being planted across seven London boroughs in January 2011.
Another 11,000 trees were distributed to 50 communities across London through the Woodland Trust community tree packs programme.