What is the oldest tree you have ever worked on ?

Question: What is the oldest tree you have ever worked on ?
- Keywords:
  age,
  research,
  tree
Asked by anon-231530 to Steven on 15 Nov 2019.
- Steven Rudder answered on 15 Nov 2019:
  
  I have work with lots of different plants. One of my favourites being coffee plants. All the plants I work with are very young though. The oldest plant I have worked with I’d say was 2 years old.

Question: What is the oldest tree you have ever worked on ?