Here in the frenzy, we love the idea of growing our own food. We also love the idea of peaceful and relaxing evenings and weekends. Or at least an occasional moment of solitude somewhere other than in the bathroom with a toddler standing outside the door to monitor your progress...
Still we take what we can get. So the easiest thing to grow yourself rather than buying at the grocery store are fresh herbs. Now I know most of us don't pick up fresh herbs every week while shopping. But there are a few occasions that you need them. And it's $2 to $3 dollars to pick up something each time when you could spend $10 at a garden center to get a lifetime supply, assuming you have a yard you can find somewhere to stick in a few plants. Plus adding more fresh herbs to your cooking could help you want to eat at home more often.
The other thing we love about having fresh herbs growing in our yard is that we don't have to bring home yet another plastic clam shell container and throw it away. So for an easy gardening win and an easy environmental win, stick a few herb plants around the yard. It may just be a gateway for going further down the rabbit hole of gardening to help your budget and your health.