Although I know people who have reported to be able to overwinter cannas in the ground in my area (DC/Baltimore area), they always turn to mush for me. I don’t know if it’s my microclimate, my soil type, or what.
Anyway, mine froze back so I yanked them yesterday. What is the proper way to divide and store the rhizomes?
Stored in dry loose peat moss should work in an unheated basement. Otherwise, do the best you can to keep dry and not too cold or hot.
I did a planting in London Kentucky in 2012. One grouping all died. Replants mostly died.
2 or 3 plants are alive last time I looked. (While, on the Southeast side outside master bedroom, they have thrived, multiplied, and are about to take over beyond the allotted space–an area about 4 x 6 feet!)
So, microclimate conditions do indeed matter. zone 6b here.
Mine always just kind of break apart naturally. Usually I just pull them apart where they look like they want to separate if that makes sense? They multiply quick. I planted 4 this spring and ended up with a tote full of bulbs this fall… I would try and plant them anyway as long as they don’t rot in the winter it’s not going to hurt.