In a small bowl, combine 1 tsp of garlic powder, 1/2 tsp of powdered sage, 1 tsp of chili powder, 1 tsp of salt, 1 tsp of black pepper, and 1 tsp of Italian seasoning. Evenly season the pork on all sides.
In a measuring up, mix together water and the remaining seasoning plus Worcestershire sauce. Pour some in the bottom of crock-pot.
Lightly season each side of the pork with the seasoning mixture and flour.
Heat up oil in a pre-heated cast iron skillet.
Sear one side of the pork for a minute or so. Flip then sear the other side. Sear the sides as well.
Place the seared meat into the Crock-Pot. Pour the remaining liquid seasoning mixture into the skillet. Whisk to get all the bits from the pan then pour the whole thing into the crock-pot. Cover and set it to LOW. Let that cook for hours. Start time was 9am.
At about 4 hours into cooking, add the potatoes. Let that cook for an hour. (Also, this is the time to reserve some of the juice into a bowl. Set it aside until ready to make the gravy.)
Then add the carrots and celery. Continue cooking until it's time for dinner.