The final round for applications to the scheme, run by Defra and the Forestry Commission, is 31 August. More than 475,000 trees have already been planted and funding has already been allocated to 152 groups, bringing the current total to almost 965,000 trees.
Forestry minister David Heath was at the W1W Tree Planting Initiative, which received £10,000 funding from The Big Tree Plant to plant 240 trees in Marylebone, London, last week.
He said: "We all benefit from having more trees in our cities and we're well on target to deliver one million trees by 2015."
The Big Tree Plant was launched in December 2010 with a Government commitment to plant one million new trees by 2015 supported by £4m of grant funding from the Forestry Commission. Local groups have identified £7m of match funding to deliver their projects.
The tree planting was also in celebration of Marylebone's W1W Tree Planting Initiative receiving a RE:LEAF Tree & Woodland award for the best street tree project in 2013.
For further details, see www.london.gov.uk/priorities/environment/greening-london/re-leaf/releaf-awards.