Shop the source (or close to it).
Buy in-season produce at farmers’ markets, but, watch those prices, because specialty vegetables, heirloom tomatoes, asparagus,
and berries can be expensive. Search for one of 4,685 farmers’ markets in the US using the USDA's Farmers' Market Search.
If you love ripe produce, like saving money, and don't mind work, visit a pick-your-own farm. Search for one here and learn how to make the most of your trip here.
Or, buy at farmstands, but check origins because many also sell commercial produce.