How long does it take to heal a broken patella?

Fracture. It generally takes 6 to 10 weeks to heal a patella fracture. Certainly the severity of the injury and how it is treated will influence healing time. Some patella fractures are treated with surgery and some are not.
Fractured patella. A fractured patella normally takes about 6 weeks to heal. After that it takes some more time to regain motion and strength.