I have a large canna plant with nice red flowers, the bulb which I was given was approx 5-6 inches by 9-10 inches. The plant is growing great with at least 12-14 shoots about 5ft high with multi flowers on each. As I live in upstate NY USA I know that I have to dig up the bulb an put it away for the winter. When and how do you divide the bulb without killing it?
