So far, the only leyland cypress I've seen that bit the dust were heavy thick canopy trees that blew over in overly soggy soil. Breakage has been mainly on leylands that were poorly selected and neglected for pruning. I've seen many that look good when in decent soil. So far, I have not seen one just die from old age - nor death from disease. Recently, in searching the internet, I found a few websites that say the leyland cypress have a short life span. How valid are those reports? Do they really have a short life span, or are people witnessing leylands die due to neglect, poor tree selection and bad site conditions? What are you tree workers seeing around the country? Around the globe? Thanks.