Rushy
basically a scrotum
You misunderstand - it's just a grammatical error. They have been watching your trees and bushes and tracking their growth rates. They have worked out that one of them is going to cause a nuisance within 14 days, and they want you to take pre-emptive preventative measures to ensure that nuisance doesn't happen. Now you've just got to work out which one.
All perfectly reasonable imo, don't know what you're complaining about.
Admittedly I binned the letter so that blip may be my error!