All About Redwood Trees Part 2 Saving Redwood Trees. This redwood tree has a big hole for cars to drive through. People do not cut holes in redwood trees today. But this tree is still fun to see! Today people want to save old redwood trees. And they want new redwood trees to grow and grow for many years. Fun Facts • Redwood trees are named for the color of their wood. • The bark on a redwood tree is 6 to 12 inches thick. • New redwood trees can grow from the stump of an old redwood tree.