Making good food choices...
We work really hard at the cafe to use local and regional suppliers and to serve fresh, health food. Soon we're going to have a good crop of our own blueberries that make it into our salads. As soon as they're picked they will be cooled and keep that way until presented to you.
Some food vendors buy products from all over the US and appear to take a little less care. Many of the local farm stands are simply one more corporate outlet. The big box grocery retailers do a good job of keeping produce cool, mist it frequently, rotate their stock and charge competitive prices. When you buy from a farm stand make sure you ask the source of the produce, understand when it was harvested, determine how long it's been sitting out in the sun and ask if it's been stored protected and properly during the night.