Slow Low Country Boil

Thanks Latonia Thrower!
Slow Low Country Boil
ingredients:
4 quarts of cold water
1/4 cup Old Bay Seasoning, or other spicy seasoning
1 TBS Kosher Salt (more or less to taste)
4 celery stalks, cut into 1 inch pieces
1 yellow onion diced
1 head of garlic halved
2 1/2 lbs of red potatoes (small)
4 ears of corn (break in half)
2 lbs of smoked sausage, cut into 2 inches slices
2 lbs of med-large fresh shrimp in the shell, deveined

Directions:
In crockpot add, water, celery, onions, garlic and potatoes. Cook on low 4-6 hours until potatoes are tender, when pierced with a fork. Add corn and sausage until corn is tender, 1-2 more hours. Add shrimp until opaque, approximately 20-30 minutes. Taste broth and adjust seasoning with additional salt and pepper. Serve Immediately. Serve with butter and lemon.