I live in Missouri,and my cannas aren't up yet.They've came up every year for the last three years,and I never have taken them out of the ground.How long should I wait before I dig them up?
Certified GKH Gardening Expert
Unfortunately, with as cold as it has been this year, overall... This will happen. Many plants that are on the edge of their survival zone can die off from a harsh winter.
More than likely these will have to be re-planted. You can dig them up now, and see if there is any life to them. If not, toss them out. If so, then re-plant in its spot.