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Leaves are normally blackened after a hard frost - say -2. The stalk then tends to be mush as well. The rhizome is hardy to -5 if kept well drained and mulched. The problem is more of how long it takes to regrow - you need the heat in a GH or house to kick start growth.gtiboy wrote:Does anyone know how hardy Canna Tropicanna is? can it survive a UK winter? If not how do you store them over winter?
I normally cut off the foliage in Nov and store in my garage. I spray then with water every so often as they need to be kept slightly damp. Tropicanna are one of the easiest to overwinter for me.