I garden for a couple reasons. First, it's relaxing. My stress level goes way down when I'm out in my garden. That is worth whatever money I spend on it, believe me. Second, it's a neverending challenge, and I do love a challenge.
I grow mostly veggies and herbs. If I manage to eat things out of my garden, it's exciting, but I don't believe that I'm really saving any money, based on the small scale of my garden. But today, as I munched my own carrot straight out of the ground, I felt very happy. Priceless!