Obviously there are some food items that are impossible to grow close to home. I'm thinking specifically of tropical fruits. Bananas are a big staple in my raw food diet and they definitely do not grow in the Ottawa valley. I could eat apples from the valley but would soon tire of them.
My goal is to eat as much locally produced food items as I can. I most likely will never be 100% with in this radius but each mile I save means a slightly smaller foot print I leave on this earth.