looking to donate quantities of compostable materials

In the coming months, I will have large weekly quantities of commercial 
Greenhouse waste.  I would like to donate it to a non-profit group or 
organization, that may be involved in group gardening.

Does any one know of such a place?  I vaguely remember a neighbourhood 
garden on Mt. Scio Road.

Any help will be appreciated, since I hate to throw good compostables in 
the trash.

Thanks,

Siobhan