Tree of life for every model railway! Almost everyone knows the evergreen thuja trees and shrubs. Thujas, often called arborvitae, are the stars of many gardens. They stay green all year round and line countless gardens and parks as hedges. With thujas, you can bring a piece of nature into your home. Ideal for hedges or as a single tree, they simply fit in everywhere. As a solitary tree, the thuja is an imposing plant and can grow well over 20 meters high.