Season generously inside and out with spices, salt, and pepper.
Stuff cavity of chicken with a half-cup each of celery, onion, and carrots.
Place the rest of the onion, carrots, and potatoes around the chicken in pan.
Bake chicken uncovered in the preheated oven until no longer pink at the bone and the juices run clear, about 1 hour and 15 minutes. A thermometer inserted into the thickest part of the thigh, near the bone, should read 165oF.
Remove from oven and baste with drippings. Cover with aluminum foil and allow to rest for about 30 minutes before serving.