How to Care for a Cedar Tree?
Keep a 2-inch layer of mulch around the tree, but not touching the trunk, to prevent moisture loss and protect the tree. It may be necessary to use a wire cage to prevent injury from mechanical devices as well. Protect young trees with a covering of landscape fabric if you live in a very cold climate.
Water small trees regularly and allow them to dry out completely between each watering.
Fertilizer is generally not necessary unless the soil is very unhealthy.
Once the tree is mature, cedar tree care involves little more than regular mulching and removal of dead or diseased branches.