Hewitt's Garden Centers > Questions > How do I know for sure when my Arborvitae are coming to the end of their lifespans? They are still green but pretty thin. I am guessing 40-60 years old. The bottom 4 feet provide 0 privacy anymore.
Depending on the variety 50-150 years so they may be. often it is raod salt that damages the lower foliage or it may simply be that the upper plant is shading the lower branches…not much can be done about it sadly.