I have a Dracaena Marginata that I got about three years ago that I keep on my covered patio here in Sacramento. This would be the third winter it has been on the patio, however this winter we got a cold spell where the temperatures got below freezing several nights in a row. I didn't think the plant
would suffer but now I am not sure. All of the leaves on the top of each cane got black and died. I pulled them all of and now the plant
is just these canes sticking up with nothing happening. Should I prune each of the cane, the tips are all spongy feeling and are a dark brown.