Pat the pork dry: Use paper towels to remove excess moisture so the seasoning sticks and browns better.
Mix the rub: In a small bowl, combine ranch seasoning, garlic powder, onion powder, smoked paprika, black pepper, and salt.
Season the pork: Rub the roast on all sides with oil, then coat evenly with the spice mix. Press it in so it adheres.
Sear for flavor (optional but recommended): Heat a skillet over medium-high and sear the pork 2-3 minutes per side until golden.
This adds depth and helps lock in juices.
Load the crockpot: Pour chicken broth and lemon juice into the slow cooker. Place the pork loin inside and dot the top with butter.
Cook low and slow: Cover and cook on Low for 4-6 hours or on High for 2.5-3.5 hours. Aim for an internal temperature of 145°F with a 10-minute rest.
Rest and slice: Transfer the pork to a cutting board, tent loosely with foil, and rest 10 minutes.
Slice against the grain into 1/2-inch pieces.
Make a quick jus (optional): Skim extra fat from the crockpot juices. Taste and adjust seasoning. Spoon over the sliced pork for added moisture and flavor.
Garnish and serve: Sprinkle with fresh parsley or chives.
Pair with cauliflower mash, roasted broccoli, or a crisp green salad.