The People’s Postcode Trust has invited charities in England, Scotland and Wales to apply for a share of £500,000.
The grant-making trust, funded by the People’s Postcode Lottery, said charities, community groups, social enterprises and voluntary organisations should join forces to apply for funding of up to £250,000 over two years for "innovative" projects.
Now in its fourth year, it is the first time the Dream Fund has been opened to applications from across the country. Grants were previously only awarded to organisations in Scotland and the North West of England. So far it has invested more than £1m in projects.
There are three funding categories – healthy living, social enterprise and environmental sustainability.
Applications should be "innovative, creative and original and present projects that are a real 'dream'", the trust said. They must come from at least two organisations and one must be a registered charity.
The funding can cover running costs, including salaries, rent, utility bills and insurance, linked to the project.
Kate Pearson, acting head of charities of the People’s Postcode Lottery, said: "This year’s Dream Fund is our biggest yet. We’re encouraging applicants to think big and be as creative as possible."
The Scottish environmental education charity Wild Things was awarded £74,069 from the Dream Fund this year to develop the Moray Firth Coastal Classroom project, an environmental education programme.
Jenna Martin, founder of the charity, said: "The funding has enabled us to increase our operations exponentially so that we could make our programmes far more accessible to a wider audience of young people and increase the benefits of getting them active outdoors."
The closing date for applications is 20 September.