We have an established 15 year old Rhus typhina, which this year failed to flower and appears to have died. There are some new suckers coming through but the main tree seems to be dead. We are looking for an answer as to what has happened. Do they just die?
They are a self propagating tree so it will likely regenerate from the suckers. There are many different reasons as to why it could have died; temperature fluctuations, fungal or insect damage, even mowing to closely to the roots. They generally can live up to 60 years so I don't think age is a factor here.