Question
hi
I have one of these that stansd around 10' tall and has been beautifull to look at over the years but this mth i have noticed the tips of all the leaves are starting to turn yellowbut new leaves are still starting to grow.
can you help please
jon

Answer
Yellow leaf tips may indicate a nutritional imbalance or other possible root related stress. Suggest having a soil test done to ID any potential issues. This can usually be done through an agricultural office or you can also contact your local family garden center for some information. A rather sudden drop in temperature at a previous time may cause this as well.  Examine the main stem for any obvious damage/injury at the same time. I don't think this is a disease/insect issue, but rather an environmental/nutritional problem.

Regards
Steve