It is a little late but prune in April and August. You can root the parts you cut off. Repot and make sure you feed the plants. Watch out for whiteflies. You will have to treat them with horticultural oil or blast them off with water every day. You cannot treat them once the leaves start to color up or they will drop all of their leaves.
After you prune the plant in August, put them in a dark place for about 6 weeks, but don't let them go completely dry. This is to trick them into thinking it is winter so they will color up for Christmas. Gradually bring them back into the light. If you don't trick them, they will still bloom, but probably around February or March.
Happy gardening in Hawaii. Gardens are where people grow.