Rinse the dried mixed beans under cold water and place them in the slow cooker.
Add the diced ham, carrots, potatoes, parsnip, onion, and garlic to the slow cooker.
Pour the chicken broth over the ingredients and stir in the thyme, bay leaves, salt, and black pepper.
Cover and cook on low for 8 hours until the beans are tender and the root vegetables are soft.
Remove and discard the bay leaves before serving.