Cloaked in dense, dark, evergreen foliage that goes all the way down to the ground, thuga green giant (standishii x plicata 'Green Giant') has a conical habit that needs only occasional shearing or pruning, says Kelly Funk, president of Jackson & Perkins.

Zone: 5 to 9
Mature size: 30 to 50 feet tall x 10 to 12 feet wide
Care requirements: Full sun to part shade; well-draining soil