Apple will release an ethylene gas after ripening. Ethylene is a natural ripening agent, so kiwi fruit is ripened by this ripening agent. Kiwifruit is particularly sensitive to ethylene in the environment. If the kiwifruit you buy is not very ripe, you can put it with mature apples for a few days, which can accelerate the ripening of kiwifruit. Why do kiwi fruit and apple ripen together? After the apple is ripe, it attracts animals to eat by producing fragrant ethylene. After animals eat, apple seeds are scattered into nature through feces, and apples can reproduce.
Ethylene, like abscisic acid and gibberellin, is a plant hormone, which widely exists in plants. Using ethylene as fruit ripening agent must be before fruit ripening, and the treatment concentration and time should be appropriate.
Bananas and apples are also more suitable to put together, because bananas do not need to wait until they are fully mature. If you buy less mature bananas and mature apples together for a few days, bananas will ripen faster. （WeiShenMeMiHouTaoHePingGuoFangZaiYiQiHuiShou）