Re: Yucca hardiness
This is the largest Y. rostrata have seen on the east coast of the US.
It is located in Stratford, CT right on the ocean. I do not know if or how it is protected in the winter. As Jeff mentioned in his post, the natural sandy soil there may be a factor in its size and success. Tim MA has grown many rostrata here in MA. I am almost certain he provides protection from excessive moisture at a minimum.