Originally posted by ewest:
I use nylon cable ties all the time and they have done fine. Some have been there 10 years. I have not heard that they could be a problem. Small dia. trot line string (black nylon) works great also.
I've had nylon cable ties last 5 or 6 years above ground and exposed to sun, rain, etc. They were still holding up (although starting to get a little brittle) when the "temporary" project was replaced with the "permanent." Underwater with no sunlight or freezing, I think they'd last a long time.
Brettski has merely insured the PVC trees will last for multiple human lifetimes, like everything else he builds.