In August I bought some really green bananas. You know how bananas just ripen on their own? I discovered that sometimes they just really don’t. Because they didn’t ripen we had to buy others to eat while these were still ripening. Compare the color. The green was even not a real true green. Sort of sickly-ish!
After a few weeks they were still sort of green, that sickly green, but the stems were black like they were over ripe!
So Mother opened one and ate it. I was a weird kind of ripe. Weird texture too!
Then a few months ago Father bought some bananas at Costco and these were extremely green, too. And the same thing happened. Mother tried the paper bag trick and after a week in the bag they were kind of ripe, again.
I suggest that we don’t buy really green bananas!
Freedom will be mine! 
January 31, 2008 at 7:35 am
I recall Andy Rooney talking 2 or 3 years ago about bananas getting brown spots on them before they even ripen. I think they might just be picking some too early.
On an obliquely related note, the cavendish banana (the variety in your pictures) is likely to be extinct within the next 8-10 years. There is a banana fungus that has recently gained the ability to infect cavendish bananas and since no one has successfully produced seeds from a cavendish banana there is no way to try and breed a fungus-resistant cavendish.
See this site for more details: http://www.sciencenews.org/articles/20030308/food.asp