Hi Rob,
Sorry about the rise in his PSA.
In my unprofessional opinion, I would not wait for 6 month if my PSA was on the rise. I would definitely get it tested at least every 3 month and take further action as soon as as the recurrence is confirmed. At least that's what I did as you can see by my signature.
Hopefully the rise in PSA is just a blip and not a recurrence.
Magaboo