Beginner Gardening: Leyland Cypress barrier for Shed / planting concern, 0 by dirtjersey

dirtjersey wrote:
Just planted two leyland cypress trees behind my shed to act as a barrier. The soil behind the shed appears to retain moisture and because of this I decided to plant the trees in a raised bed. The space is somewhat restricted with only 5 feet front to back and 10 feet side to side. I originally dug holes for the trees but decided to move them after several weeks because of the water retention. The bush that was pulled from the planting location originally was partially rotted.

The dimension of the raised bed is roughly 9 inches deep 3.5 feet width and trees are 6 feet apart.
The area gets some sun and the soil is somewhat clayish
The planting area is at the end of a slope so that may be why it retains moisture a bit longer.

My concern is that my raised bed will not hold the trees and also that when winter hits the raised bed will not protect the roots from the cold.
I keep calling it a raised bed and not sure if that is even the correct name for it.