My main reason for wanting to garden is so I know exactly what is in and on my produce, and also for taste. The stuff I have been getting fro the grocery store for the past couple years is just junk. Even organics in the grocery store aren't very good. I try to buy as much as I can from local farmers, and we have a great little farmers market twice a week that makes it very easy. I am doing a CSA this year through my favorite farm. It's the ultimate in convenience. I show up Wednesday afternoon, had her 20 bucks and she hands me a big bag of produce.
It's been stupid to try to grow a garden in the past few years, b/c we have been moving so much. Twice now I have had to leave stuff behind. I think we are here in this house pretty permanently though, so I'm thinking about doing a garden next season.
There are definite pluses to growing my own, vs continuing with the CSA, mainly that I can grow exactly what I know we will eat, and I can grow enough to have a surplus to be able to can/freeze for winter.
I'm wondering though if it's cost effective. Our water is free, and I have access to any gardening tool I might need. The soil here is AWESOME, so I can basically just plant directly in the ground with no soil prep other than tilling. I also have access to a small green house. Once I factor in the costs of seeds and esp my time, I'm wondering if I should just stick with the CSA, but get a full share ($40/week) so I have extra to preserve. I'm not sure I'm ready for the commitment that a garden takes.