S.S.
D.,
As a mother to 3 boys, let me give you this advice. They start to wean themselves off of naps. He is at that point where is ready for only one nap a day and it will be a nap that will last anywhere between 1 1/2 to 3 hours. Try laying him down between 11 and 11:30 to start and work from there to see what works for him, he will let you know. Let him sleep until he wakes up. Keep his routine the same at night. I have kept my boys routine the same at night and it has worked great. When they turned one they only wanted the one nap at noon, then to bed at night around 7:45/8:00 and then they were up between 6:00 and 6:30 (no need for me to wake them) they were getting plenty of rest.
Hope this helps to ease your mind a bit.
Good luck.
S.
34 year old SAHM of 3 boys 13, 5 and 2 1/2