Kiwis too hard should be left for about 3-7 days to soften.

It depends. Usually it can be left at room temperature for about 5 days to ripen naturally, but most people feel that it takes too long, so you can ripen it by placing kiwifruit with already ripe fruit. Already ripe fruit releases ethylene, a ripening gas, and can therefore have a ripening effect.

To ripen, kiwis need to be exposed to ethylene, the gas that sends the message that it's time to ripen. In everyday life, ethylene is released by aromatic ripe fruits such as apples, bananas, pears and mangoes.

If the kiwi is hard, you can put it in a plastic bag, close the seal of the bag briefly, do not seal it completely, it will cover the fruit, and then put it at room temperature for a period of time, when the kiwi pinches up a little bit soft, you can eat it.

Kiwifruit ripening and softening methods:

1, the kiwifruit into a plastic bag, seal the bag, the bag placed in a warmer environment, in the role of high temperature, three days or so kiwifruit will become soft.

2, will buy the kiwi and ripe bananas, apples and other fruits together, apples, bananas release ethylene can quickly ripen kiwi, probably only 2-3 days to soften to eat.

3, with a toothpick in the surface of the kiwifruit prick a few small holes, and then put the kiwifruit into a plastic bag sealed, small holes can stimulate the kiwifruit to produce more ethylene, so that within a day or two kiwifruit will become soft.