I had my surgery on 9-13-2011 in Orlando, FL. I remember the surgeon saying that I should not have radiation until my insides had healed from the surgery. He said that would take at least 12 weeks. When I left Orlando and returned home to Jacksonville, the mayo clinic set my date to begin radiation on 11-28-2011. That was one day short of being 11 weeks from my surgery date. I know that doctors differ on when to begin treatment after surgery and I think it has a lot to do with your PSA reading 6 weeks after surgery. If the reading is less than .1, then many doctors will not do any treatment at all. They will simply test your PSA every 3 months and only start treatment if it begins to rise. Other doctors will begin treatment regardless of PSA reading if cancer has a high gleason score. I'm not sure which method is best, but I purchased a book from Amazon.com called "Guide to Surviving Prostate Cancer" by Dr. Patrick Walsh and he explains the advantages and disadvantages of both methods.