Another way to cut grocery costs are food co-ops. They pool all the money together and buy local produce from farmers at lower prices than retail and divide it between the people in the co-op. Some even include meat.
I am in a food co-op here. I get most of my veggies and fruit that way. I pay $25 a month and they deliver to my house. Twice a month, and big boxes of produce.
If you good food co-ops for your area you might be able to find something. These are not low income only, just people in the community who start them up. Good for the environment, your local economy and for you.
Some food co-ops are set up like a store, the one I use is not. It's just delivered to me.
I put a thread for food co-ops and community kitchens ( which are not soup kitchens ), more like cooking lessons and you take home what you make.... I put a thread in the recession, layoffs, and economy forum for anyone who is interested.