Plant grows really slowly and lives upto 300 years?

Question

its a plant

Answer 1

There's plenty of trees that can do this, unless felled by fire or people. Like the sequoia & redwood out in western USA and plenty more, that were around before the Civil War. Of course, there's more than can span 150-200 yrs, that can get to 300.

Answer 2

Evergreen shrubs can grow 1/2 an inch annually, and live for hundreds of years. Some examples are holly, hornbeam, privet, and yew