In a small bowl, mix the garlic powder, tarragon, thyme, salt and pepper. Season the roast with these spices.
Place the roast in the bottom of a 5 qt or 6 qt slow cooker.
Add the carrots, potatoes and onions on the sides around the roast.
Pour the beef stock around the sides of the slow cooker.
Cover and cook on LOW for 8-10 hours.
Serve and enjoy.