The cash, of which £2.5m was awarded by the Heritage Lottery Fund (HLF) on 3 March, will be used to completely revamp the St Ann's Allotments in Nottingham.
The 32ha site - which dates back to 1830 and is home to several grade II*-listed sheds, as well as Victorian summer houses and greenhouses - is set to undergo plot clearance, hedgerow work and improvements to its paths.
In addition, the largest chunk of regeneration funding will be used to replace the water infrastructure and build a bore hole.
St Ann's community organisation the Renewal Trust has been involved in the funding bid and its community business adviser Mike King said the money would make an enormous difference.
He added: "(The allotments are) a wonderful green space within the city, a resource for healthy living and a historical site. The HLF saw the importance of that."