Question
I have been told that the Leland Cypress breaks easily due to wind, snow and ice.  Is this true??  Also, could you answer the same question about the Thuja Green Giant?  I live in Zone 7; Glen Burnie Maryland.
Thank You.

Answer
Leyland cypresses, XCupressocyparis leylandii, are not fairing well in many landscapes. It is a fast growing tree used in boarders and screens that had relatively few pest problems. Now is has been suffering from branch die-back. Sadly, it can cause the death of the tree. Seiridium canker is the cause. This disease is not to the point of wiping out this tree, but I would recommend not planting this tree as it likely will in the future be a major concern. Why plant a tree that is not going to be healthy or is suspect? Thus landscape designers should seek a replacement for the Leyland Cypress. One great choice is the Green Giant Arborvitae. Green Giant arborvitae is becoming a superstar in the plant world. It is the most popular arborvitae next to the Emerald Green Arbor vita. The reason for its success is that it fills landscape needs that are important. It will help block large unsightly neighbors quickly and is basically pest free.

The Green Giant Arborvitae is recommended for growing as a hedge or privacy buffer along a property line, or driveway. Thuja Plicata, Western Red Cedars are ideal "windrow" trees. In a row, they'll truly diminish the wind. The Green Giant Arborvitae is justifiably considered wind resistant considering the windswept mountains of the Pacific northwest. The wood itself is weak, but it is very light. Green Giant Arborvitae do have better deer resistance than most arborvitae.