In a large resealable plastic bag, combine the flour, salt & pepper; add the chicken, a few pieces at a time, and shake to coat.
In a large skillet, brown chicken in oil; remove and keep warm.
Gradually add broth to the skillet; bring to a boil
In a 5 qt. slow cooker (crock-pot), layer the carrots, celery and onion; sprinkle with rosemary.
Add the chicken and hot broth.
Cover and cook on low for 6-7 hrs. or until the chicken juices run clear, vegetables are tender and stew is bubbling.
Stir in peas