Vegetables and ethylene gas

Tomatoes, potatoes, onions, and other vegetables may not be compatible when stored together, primarily due to ethylene, a gas naturally produced by certain plants that accelerates ripening and can cause deterioration in neighboring vegetables.

Ethylene's effects on vegetables

Exposure to ethylene can accelerate the yellowing of green vegetables, alter the texture of certain vegetables, making them softer or more fibrous, and reduce their shelf life by accelerating their aging. The goal is to separate vegetables that emit enough ethylene to affect their neighbors from those that are sensitive to it.

Vegetables that produce ethylene

Tomatoes are among the vegetables that produce a moderate amount of ethylene, especially during ripening. Other vegetables emit it in smaller quantities, including cucumbers, eggplants, and peppers. The amount of ethylene varies depending on the variety, maturity, and storage conditions of the vegetables.

Vegetables sensitive to ethylene

Some vegetables are particularly sensitive to ethylene, even if they produce very little themselves. The main vegetables to protect are broccoli, cabbages, carrots, lettuce, asparagus, and cucumbers and zucchini. Sensitivity varies depending on the vegetables and storage conditions. For example, cucumbers belong to both categories: they produce a small amount of ethylene, but they are also sensitive to that emitted by other vegetables.

Vegetable pairings to avoid

Some pairings require special attention because they can accelerate the aging of the most sensitive vegetables. Examples include ripe tomatoes and lettuce, ripe tomatoes and broccoli, ripe tomatoes and cucumbers, and ripe fruits and leafy vegetables. The correct approach is to store ripening tomatoes away from sensitive vegetables and avoid placing ethylene-emitting fruits directly next to the vegetable bin.

Other factors affecting freshness

Ethylene is not the only factor that influences the freshness of vegetables. Temperature, humidity, ventilation, their initial condition, and storage duration also matter. Potatoes and onions or garlic should be stored separately, as onions and garlic can emit ethylene and contribute to accelerating the germination or aging of potatoes.

Proper storage conditions

A dark, dry, and well-ventilated place is recommended for potatoes, while onions and garlic should be stored in a dry and airy place. Fresh vegetables, such as lettuce and broccoli, require storage conditions adapted to each variety, often in the refrigerator. Dried vegetables, such as lentils, chickpeas, dried beans, and peas, should be stored in airtight containers, away from moisture and heat.

Handling damaged vegetables

Damaged vegetables and healthy vegetables should be separated, as damaged vegetables can accelerate the deterioration of nearby foods. Regularly inspect baskets and the vegetable bin in the refrigerator. Remove spoiled or moldy vegetables and clean the container if necessary.

Separating strong-smelling vegetables

Onions and vegetables sensitive to odors should be stored separately, as onions emit a strong odor that can permeate certain foods.