How to prune these giants?
I have two plants, one I know is Dracaena fragrans and the other, I'm guessing, is Dracaena marginata. These plants are over 17 years old. They were part of a small bowl of plants given as a gift on the birth of our daughter in 1986. As you can see, both are now really large. I got away with pruning the fragrans down to the woody part a few years ago and it is now brushing the ceiling again. The marginata (?) has never been pruned and is now higher than the windows and corkscrewing around trying to look out. Can I get away with pruning the fragrans again? Lower than before? Can I prune the marginata(?)without killing it? If pruning is possible for either plant, how and when should I do it? Thanks!