How to Tell If a Tomato Has Gone Bad

Signs that a tomato has spoiled include excessively soft or shriveled skin, liquid leaking from cracks, white or dark mold, watery rotten spots, and a sour smell. A fresh tomato has skin that is slightly flexible but firm and a vivid color. A noticeable loss of these qualities means the tomato should no longer be eaten. Tomatoes have a high water content, so they spoil faster than many other vegetables. They soften as they ripen and eventually begin to rot. Small cracks or bruises make it easier for microorganisms to enter and speed up spoilage. Tomatoes kept in the refrigerator can become mealy and lose flavor; this is a quality issue rather than spoilage, although prolonged storage may lead to rot. Tomato variety matters, too: thin-skinned, juicy varieties soften and spoil faster than firm-fleshed ones. Use the ripest, softest tomatoes first to reduce waste.

What should you check for?

Before using a tomato, check its appearance, texture, and smell. Spongy areas that cave in when pressed and have lost their liquid are clear signs of spoilage. Discard tomatoes with white, gray, or black mold on the skin or around the stem. Cloudy liquid leaking from cracks or a sticky surface can indicate that the inside has started to rot. Discard a tomato with a sour, fermented, or moldy smell. Excessively wrinkled skin that has lost its firmness can indicate that the tomato has lost moisture and freshness.

Common mistakes when assessing tomatoes

Some mistakes can lead to unsafe food. Do not cut off a moldy spot and eat the rest; mold can spread more easily through juicy produce. Looking only at the outside without checking the texture may cause internal rot to go unnoticed. A slightly wrinkled tomato that still smells fresh and feels firm does not necessarily need to be thrown away; it can be used in cooking. A tomato that is starting to spoil can also speed up spoilage in tomatoes stored beside it.

How should you store tomatoes to slow spoilage?

Store unripe tomatoes at room temperature in a cool spot away from direct sunlight, with the stem end facing down. Fully ripe tomatoes may last a few more days in the refrigerator. Cold can weaken their texture and aroma, so bring them to room temperature before eating to improve their flavor. Storage time varies with tomato variety and ripeness.

In brief, assess excessive softness, mold, leaking, and sour odors together. If a tomato looks or smells suspicious, the safest choice is not to eat it. Proper storage and regular checks can slow spoilage and help prevent it from spreading to other tomatoes. Use ripening tomatoes in sauces, soups, or other cooked dishes before they rot.