Up until this morning I had what I thought was a solid plan to get my Cannas through the winter here in Victoria bc, if it ever comes...
Then, I went to a seminar at a local nursery and they discussed cannas, and suggested that you needed to lift them. They said that they may survive in the ground but that they tended to be less vigorous when left in the ground, and they were prone to rot in the cool damp we tend to get.
I was planning on leaving them in the ground. They are in a raised bed (three ties high), composed of soil, compost and sand, and is very well draining and about 12 inchs or so deep, more in some parts. The bed backs onto a retaining wall about 3ft or so high made of those interlocking allen blocks (I think)and faces north. There is a drain that runs behind the wall so there is no water coming from that direction. I was and I think still am planning to mulch the bed heavily, using full oak leaves for the top few inches to help sheild the bed from the rains a bit. I was going to run mesh to cover the mulch and hold it in place.
Could anyone from the PNW or BC coast give me some idea on their experience in this. I would prefer to leave them in the ground, but I really do not want to lose them. I do understand that it is more risky to leave them in the ground, but I was feeling pretty confident that what I had planned would work. Am I worrying to much?