Depends. Depends on the tendon torn, the degree of tear, the ability to repair with non-surgical means versus surgical means, ability to rest, splint, not use the area, time on crutches, boot splint, or other and the type of physical therapy your get. See a reputable orthopedist or sports medicine physician and get an evaluation. You may need to see a foot and ankle trained ortho to see you.
Fix it. If a tendon is actually torn or disrupted it can not be expected to recover unless it is surgically repaired or reconnected.