Yes, for sure green bell peppers are simply not ripe. When I said "green" above, I was referring to a plant or seed pack that is marketed as a 'green' pepper or is called a 'green' pepper. For years I thought that it was peculiar that some are marketed as green and others marketed as red, when in fact all of those most always turn red. The only explanation I can come up with is as stated above. If it is marketed as a 'red' variety, then it has been selected for superior color and perhaps sweetness. Here is one small bit of evidence for the above conclusion. I've noticed in Sam's wholesale club that they usually carry a red six pack of bell peppers for $3.88 or thereabouts. They also carry an orange, yellow, and red multipack for around $6-$7. The reds in the red six pack are dull red without a particularly great flavor. I'm assuming those are common green bells that were allowed to ripen. The color of the reds in the variety pack is a much truer, intense red color, and the fruit is likely to be much sweeter than that of the more common bell peppers. I guess part of the cost difference could lie in the fact that many of the multipacks are greenhouse grown. But in the grocery store ALL of the very nice yellow, orange, or true red peppers are ALWAYS much more expensive than the others found elsewhere.
Eclectic gardening style, drawing from 45 years of interest and experience. Mostly plant in raised beds and containers primarily using intensive gardening techniques.