Oak trees do not have acorns until they are fifty years old or older. Posted on June 12, 2013November 10, 2013 by admin Oak trees do not have acorns until they are fifty years old or older. VN:F [1.9.22_1171]please wait...Rating: 0.0/5 (0 votes cast)VN:F [1.9.22_1171]Rating: 0 (from 0 votes)