I bring mine inside to a cool greenhouse, and cut them back when I need the room that they're taking too much of. We water them as necessary, but don't feed them. They can be cut back fairly hard and will re-sprout from old leaf scars. But if the stems are woody, don't cut back that far as they will have trouble sprouting from woody growth.

 

Thanks!! This will help--Esp. the advice about pruning!