If it's just your meniscus, and you don't have any torn cartilage or anything else going on in there, your rehab will be pretty fast. I had my meniscus repaired last November, and my dad (who is 68) had his done this February. I also had a cartilage tear requiring microfracture, which is what held up my recovery. Dad was up and walking in 3 days, completely recovered (out of PT) in less than an month.

Speedy recovery