It's very interesting that DH suggested That the lack of bees could have someting to do with this problem. He could be right on target. There is a decline in the bee population in America and in the future it will wreck havock on farming. Even though the honey be is an intoduced species from England they have become a very important part of our ecosystem and we are destroying it at a faster and faster pace. You should google about the bee problem. You will be amazed at these wonderful little creatures and what is happening to them. Maybe start a hive of your own!
I love green beans and am saddened for you not to have any this year.
peace