A Time When They Are Green Riddle

Riddle: A time when they are green, a time when they're brown, but both of these times, cause me to frown. But just in between, for a very short while, They're perfect and yellow and cause me to smile! What am I talking about here?

Answer: Bananas.

Source: https://www.riddles.com/1070

Riddle: A time when they are green, a time when they're brown, but both of these times, cause me to frown. But just in between, for a very <a href="https://www.riddles.com/short-riddles">short</a> while, They're perfect and yellow and cause me to smile!
What am I talking about here? Answer: Bananas. — by Anonymous v1.

Riddle: A time when they are green, a time when they're brown, but both of these times, cause me to frown. But just in between, for a very <a href="https://www.riddles.com/short-riddles">short</a> while, They're perfect and yellow and cause me to smile!
What am I talking about here? Answer: Bananas. — by Anonymous v2.