To keep bananas from ripening too quickly, put them in the refrigerator or separate them from the bunch and wrap the end with plastic cling wrap. Wrapping the end of a bunch may also work, but may make it difficult to seal off holes.Continue Reading
The peels of bananas placed in the refrigerator may brown, but the fruit will stay fresher longer. Bananas ripen because the starch is converting to sugar making a riper, sweeter banana.
Once past the ripening stage, the bananas begin to brown. The stems release ethylene gas, which seeps into the other parts of the fruit and changes its color.Learn more about Fruits & Veggies