Place the diced onion, minced garlic, cubed potatoes, and diced smoked turkey into the slow cooker.
Add the chicken broth, smoked paprika, dried thyme, salt, and black pepper. Stir once to combine.
Cover and cook on low for 6 hours, until the potatoes are tender.
Stir in the chopped kale, cover again, and cook for 30 more minutes on low until the kale wilts.
Taste and adjust salt or pepper if needed before serving.