I Have A Acer Tree I A Pot About 25 Years Old Been Fine Untill This Year Wear It Only Has A Few Leave On New Stems Nothing On Olde

Question

r stems . New stems with a few leaves

Answer 1

It may be root bound if this has not had root pruning in this time! Doing so, and refreshing the soil will help:

https://www.gardeningknowhow.com/houseplants/hpgen/prune-roots.htm

https://www.gardeningknowhow.com/ornamental/trees/japanese-maple/japanese-maples-in-containers.htm