Storing tomatoes upside down can help extend their freshness by preventing moisture loss and slowing down spoilage at the stem.
Tomatoes tend to spoil faster at the stem end because that's where they were attached to the vine and where moisture loss and mold are more likely to occur. By storing tomatoes upside down, with the stem end facing down, you can minimize the area in contact with surfaces and reduce moisture loss from that vulnerable spot. This can help slow down the ripening process and prevent the development of mold or soft spots, ultimately extending the tomato's shelf life by a few days. It's best to store them at room temperature, away from direct sunlight, for optimal results.
Avoid storing tomatoes in the refrigerator unless they are already overripe. Refrigeration can negatively impact their flavor and texture, making them mealy.