Most fruits and vegetables are not grown all year round. They are grown in their most fruitful season then frozen, stored and sold as needed. This can cause a lowering of freshness and flavor, especially when the season of freshest produce has been a while. For example have you ever bought a tomato in the spring time, only to bite into it and taste a watery, grainy tomato? Tomatoes are freshest in the summertime, usually late summer.