- You Will Get 150 Seeds Of Arborvitae Tree Shrub Bush Thuja Occidentalis Tree Seeds. - Perennial. - Evergreen. - Grows 20 to 40 feet tall. - Full sun or part shade. - Zones 2 to 8. - Arborvitae is a common hedge also used as a windbreak or fence. - Can grow in sun or part shade. - Plant seeds in the fall because they need a cold moist period to germinate in the spring.