I would second the 5 Weeks requirement.
I had 4 weeks reserved to finish it off when I had 9 hrs already on my logbook, albeit in Malaga. Of that I flew 10-12 days and other days either it was too windy, low ceiling, or the a/c was unavailable or the instructor was sick.
The best way to plan would be to learn from someone's experience who had been to the flight school you intend to join.