Hello, Does anyone know of any plant forensic labs, I have heard Bartlett tree has one. If known how were you results, my situation is as follows. My customer has had 4 arborvitae die in exactly the same location each of the last 4 years. I doubt insect trouble because it's in a row of close to 50 just like it also disease seems unlikely for the same reason. My thought is drainage trouble, seems to be sitting in a bit of low spot I'd like to get a definite answer beofre I install a replacement and end up garunteeing it in 1 year. Oh yeah, I posted a question about Bartlett a few eeks ago and as it turns out they were brutally expensive...like 2.5 times the other local estimates.