Thuja Green GiantThe Fastest Growing Quality Evergreen Why Thuja Green Giants? The Thuja Green Giant quickly gives you a lush, rich privacy screen (3 5 feet per year once established). And it's: Drought tolerant Disease and insect resistant Easy to grow and very adaptable You can block out neighbors while taking very little yard space. Thuja Green Giants grow in a uniform shape and height. You get that classic French Renaissance look without having to prune or shear.