Posted: 28/08/2013 at 18:24
Those nail.holes won't cause a problem. Palms are corky and quite different to most trees, shrubs.
They do naturally shed their bottom leaves and do so throughout the year. Yours is simply getting taller.....looks green at the top
They grow everywhere down here. If mine I would cut back a couple of those branches.....mid spring would be an ideal time. New shoots would then grow at the cut points. Then ...maybe a year later.....repeat on another branch or two.
I'm currently doing something similar with a variegated cordyline that I allowed to grow,vigorously on a simgle trunk. I notched points in the outer layer of the trunk to encourage new shoots that are now each about 2' long. Next year they will be 3 or 4' and then I will cut back the single lomg....15'......trunk