When I moved outside the US, I started going to the grocery store 2-3 times a week. This likely has a similar effect to the box service. It makes it really easy

When I moved outside the US, I started going to the grocery store 2-3 times a week. This likely has a similar effect to the box service. It makes it really easy to get into a cycle where I'm generally buying meals based on the leftover vegetables from a different meal. As far as what is in season, I'd suggest simply checking the ads. In the US, a lot of foods get cheap when they are in season. Here in Norway, the prices go up (Paying more for better quality due to it being in season). If you simply pay attention to this sort of thing for a while, you get the hang of it. Another method is to check traditional foods for the different holidays and seasons, as they are often centered around seasonal foods.