My tomato cages are green wire coated things that are in a triangle shape, about 5 feet tall. Then that makes them shorter when you push them inground. I don't like those round cages for tomatoes, too short and rust really easily. I will use mine, I have lots of them and by the time the dahlia folliage grows, I doubt that you will notice the cage much. We will see how it does. I really would rather not go with having to do stakes.
