Thuja Green Giant – Fastest-Growing Evergreen Privacy Tree (3–5 ft./Year)Thuja Green Giant The #1 Fast Growing Privacy Tree in America When people want a privacy screen that actually works fast, dense, and low maintenance they plant the Thuja Green Giant. It's the most widely planted privacy tree in North America for good reason: it grows 35 feet per year, reaches 3050 feet at maturity, and requires almost no care once established. Whether you're screening a neighbor's fence, blocking road noise, creating a windbreak