Grow your own grocery store?

I was reading the news today and read an article on how many Americans are struggling through the recession and are growing gardens in thier backyards to save money at the grocery. I think this is a great idea and will save Americans tons of money! Again on a news channel this morning, a woman reported that she estimated saving about $150 a month by growing a vegetable garden in her backyard. She reported that she nows rarely goes to the grocery store for fresh vegetables, but does go to the store for other needs. My mom has always had a garden in our backyard for years and I'm sure has saved much as well as having the advantage of chemical-free food. The only problem I see here is that if other Americans catch on to this money saving idea, grocery stores will start losing money and therefore farmers will lose money as well. It is a vicious circle American is in. Hopefully someday very soon we will be out of this recession and back to a stable economy.