Currently there is a lot of initiatives in the UK to encourage organisations and individuals to grow locally. I live in London so don't know much about the north. I kow that Groundworks operate in your area. Contact details for Groundworks local to you
Groundwork Oldham & Rochdale, Environment Centre, Shaw Road, Higginshaw, Oldham OL1 4AW
T : 0161 624 1444
F : 0161 624 1555
They should be able to provide good advice and help to sighpost you to local resources that might be available. You might also want to talk to the folks at Fullwood Community Garden to see what advice they can offer on fundraising strategies.