We are replacing our interior doors with solid pine wood doors, however, the door trim and case is being left as is (painted white), do I have to paint the doors white to match the trim or can I just put a wood stain that matches our hardwood floors?
It is perfectly fine to stain the door. When staining softwoods you may have to use a clear conditioner product first. Softwoods absorb a lot of stain and can end up looking blotchy and uneven. Also make sure to sand the door well before starting. I prefer a natural stain on the door to match the floor, some people may not. It is a matter of your preference.