Mangoes are a delicious and nutritious fruit, but it can be difficult to tell when they are starting to spoil. Fresh mangoes should have a firm texture, while those that are beginning to rot may have soft spots or brown marks. An unpleasant smell or deep wrinkles on the skin can also be signs that the mango is no longer good. If the mango gives way slightly when pressed, it is ripe and ready to eat.
However, if the press pierces the fruit, it is overripe. It is important to note that an overripe mango and a spoiled mango are two different things. Lightly ripe mangoes can still be used in smoothies, purees, desserts, jams, or chutneys. To tell if a mango is bad, look for a shabby handle with a very soft texture and an abundance of dark spots and bruises. Raw mangoes have a sour flavor due to their high content of oxalic, citric, and succinic acids. Compared to ripe mangoes, raw mangoes have significantly higher levels of vitamin B complex and vitamin C.
If you notice any signs of mold growth or a bad smell or look, discard the mango immediately. The strong smell of spoiled mangoes is due to their high sugar content which causes them to ferment naturally. Cold temperatures are the natural enemy of unripe mangoes but are ideal for those that have reached full maturity. Mangoes are also very sensitive to frost; if your area experiences frost during certain times of the year, it may not be advisable to plant a mango tree there. To ensure that your mangoes stay fresh for as long as possible, store them in a cool place away from direct sunlight.