It worked! I designed this thinking that it would be a way to recycle toilet paper rolls and I am always looking for things to start seeds in in the spring. It took a couple of tries to make sure that it held enough moisture and could "breathe" while supporting the tube. But I think I've been successful. I printed it in PLA with no supports. Then simply put in a toilet paper roll, filled it with dirt and seeds and watered it until they were a good size to replant.