If you want to grow your own petunias but don’t have the space, a good way to grow a beautiful, low-maintenance tree is to grow them in a pot. If you don’t have a large enough container, a hanging basket or container that’s about 10 feet square will do the trick. You can attach a 50-inch PVC pipe to the bottom of the pot by putting the coupling on the right side. Once the cement has dried, you can proceed with the next step.