Q.What Material Is Good For an Outdoor Planter?
I want to plant morning glory vine and use a trellis for the vines; will be kept on the driveway.

Certified GKH Gardening Expert
I would suggest that you make sure your soil is well-draining, although it does not need to be highly nutritious. Morning glories are not fussy about soil. Make sure your planter has drainage holes. Plastic pots do better through the winter, as clay or pottery tend to break.
https://www.gardeningknowhow.com/ornamental/vines/morning-glory/growing-morning-glories.htm
https://www.gardeningknowhow.com/special/containers/choosing-containers-for-potted-environments.htm