* 07:00, arriving in Plo?e at 11:00, via Mostar at 09:30 * 18:18, arriving in Plo?e at 22:06, via Mostar at 20:40
Buses from Dubrovnik to Ploce run very, very often from Dubrovnik. Every hour, day & night, so you should have no problem finding one any time you need. Some info is here [http://www.libertasdubrovnik.com/voznired.swf] but there are more buses.