Apples

Apples keep 4–6 weeks refrigerated, and only about a week on the counter — a bigger difference than almost any other fruit.

Store them in the crisper drawer, ideally in a perforated bag. Apples continue respiring and losing moisture, and the cold slows both dramatically.

Keep them away from everything else. Apples are among the strongest ethylene producers in a kitchen, and ethylene ripens and ages nearly all other produce. An apple in the crisper with your lettuce, broccoli, and carrots will noticeably shorten their lives. That said, the same property makes an apple useful for deliberately ripening avocados or peaches in a paper bag.

One bruised or rotting apple genuinely does spoil the barrel — damaged fruit releases far more ethylene. Sort them and remove any that are going.

Apples freeze only as slices, preferably treated with lemon juice, for about 8 months.

Apples are built for storage. A thick waxy cuticle limits water loss and microbial entry, high acidity discourages bacteria, and a dense low-water-content flesh resists collapse. Commercially they are held for months in controlled atmosphere storage — low oxygen, high carbon dioxide, near freezing — which is why you can buy a crisp apple in July that was picked in October.

They are also strongly climacteric, producing large amounts of ethylene as they ripen and responding to it as well. This is what limits them at home: an apple sitting on a counter is essentially ripening itself, and the process runs several times faster at room temperature.

The classic failure is mealiness — flesh that has gone soft, dry, and grainy rather than crisp. That is the middle lamella between cells breaking down, so the cells separate whole instead of rupturing when you bite. It is a texture failure, not a safety one.

Beyond that: brown soft spots are bruising and can be cut away, and shriveled skin is water loss.

Mold means discard the apple. Because apples are high-moisture, the USDA advises against salvaging moldy soft fruit, and some apple molds produce patulin, a mycotoxin that is a particular concern for cider made from damaged fruit.