You haven't tasted real tomatoes until you've had tomatoes on the vine. Tomatoes stay on the vine so that they can continue ripening until they reach their peak maturity. When tomatoes are picked at their fully ripe stage—which you can tell by their rich, red color—they're sweeter and tastier. One bite and you'll see that tomatoes on the vine are known for their quality flavor and texture. To enjoy these tomatoes at their best, do not refrigerate them but instead keep them on the counter out of direct sunlight.