This was the answer to one of the trivia questions at our November dinner meeting. The world’s largest rose bush is a white rosa banksiae banksiae, commonly known as Lady Banks’ rose, located in Tombstone, Arizona. Rosa banksiae banksiae was introduced in the United Kingdom in 1807.
The original root of this spectacularly successful rose bush was sent from Scotland in 1885, and was planted by newly-wed Mary Gee behind her boarding house. The single trunk is approximately 12 feet in circumference. From this single trunk it spreads over an arbor that covers over 8,000 square feet. In spring it is covered with millions of small, fragrant, double white blooms.
Click this link to view a picture of this amazing rosebush –> World’s Largest Rose bush