I would like to repot my living Christmas tree. It is about 4 feet tall, and I have no idea what size pot to use or what type of compost/soil is needed.
Re-Planting Christmas Tree
Certified GKH Gardening Expert
You would want to use a pot that is at least 2" larger than the one it is in now.
This article will help you regarding soil: https://www.gardeningknowhow.com/special/containers/proper-soil-mix-for-evergreen-container-plants-and-trees.htm